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Pioneer League (baseball)
Baseball league in the Western United States
Baseball league in the Western United States
| Field | Value |
|---|---|
| title | Pioneer League |
| upcoming_season | 2026 Pioneer League season |
| logo | Pioneer League.png |
| logo_size | 200 |
| classification | Independent league |
| sport | Baseball |
| founded | |
| president | Mike Shapiro |
| commissioner | Henry Hunter |
| teams | 12 |
| country | United States |
| champion | Oakland Ballers (2025) |
| most_champs | Billings Mustangs (15) |
| website |
The Pioneer Baseball League (also known as simply the Pioneer League) is a professional baseball league based in the Western United States. It operates as one of four Major League Baseball (MLB) Partner Leagues in the American independent baseball league system without MLB team affiliations. The league is contested by twelve teams from California and the Rocky Mountains region, who play a regular season split into two halves. The top two teams at the end of each half qualify for a postseason tournament that determines the overall champion.
The Pioneer League was established in 1939 as a Class C minor league consisting of six teams from Idaho and Utah. It later expanded to Montana as part of a failed effort in the 1950s to become a third major league rivalling the American and National leagues, complicated by competition with the Pacific Coast League. By the time it was reclassified as a Rookie league in 1964, only four teams in Idaho remained. Gradually, it returned to Montana and Utah, and expanded into Colorado and the Canadian province of Alberta by 1974, and since then has consistently had eight or more teams competing. In 2021, the league became independent, and ceased all MLB team affiliations, reorganizing as an MLB Partner League representing the Western United States market. Though all the league's teams in Alberta and Colorado have since folded or relocated, an expansion into California in the 2020s balanced the number of teams.
As of the 2026 season, four teams from California and Montana each, two from Idaho, one from Utah, and one travel team, compete in the Pioneer League. Twenty franchises have competed in the league across its -year history, with the Missoula PaddleHeads, a current team that joined as the Pocatello Cardinals in the inaugural season, being the longest-tenured. The Oakland Ballers are the current champions, while the Billings Mustangs have won the most championships (15).
History
The Pioneer League began in 1939 with six teams in Idaho and Utah, operating at the Class C level. The original six teams were the Boise Pilots, Lewiston Indians, Ogden Reds, Pocatello Cardinals, Salt Lake City Bees, and Twin Falls Cowboys. With players in short supply due to World War II, the league suspended operations for the 1943 through 1945 seasons.
In 1948, the league expanded by adding two teams in Montana; the Billings Mustangs and Great Falls Electrics. In these early years, teams in the league either operated independently or were affiliated with Major League Baseball (MLB) or Pacific Coast League (PCL) parent clubs, as the PCL was attempting to grow into a third major league (a bid that ultimately failed). When MLB's Los Angeles Dodgers displaced the PCL's Hollywood Stars in 1958, the Stars relocated and became the "new" Salt Lake City Bees, remaining in the PCL and taking away the Pioneer League's largest market.
By 1959, the Pioneer League was down to six teams; Billings and Great Falls along with the Boise Braves, Idaho Falls Russets, Missoula Timberjacks, and Pocatello Athletics. The league operated at the Class A level for one year (1963), before changing to Rookie league in 1964, when there were only four teams in the league; the Idaho Falls Angels, Magic Valley Cowboys, Pocatello Chiefs, and Treasure Valley Cubs. By 1978, the league had again grown to eight teams — Billings and Idaho Falls along with the Butte Copper Kings, Calgary Cardinals, Great Falls Giants, Helena Phillies, Lethbridge Dodgers, and Medicine Hat Blue Jays. With the exception of 1986 (when there were six teams), there have been at least eight teams in the league since then.
In 2016, total league attendance was 616,686, down slightly from the 2015 total of 633,622.
In its final years as an MLB-affiliated league, the Pioneer League was one of two "Rookie Advanced" minor leagues along with the Appalachian League. As such, it occupied the second-lowest rung in the minor league ladder. Although classified as a Rookie league, the level of play was slightly higher than that of the two "complex" Rookie leagues, the Gulf Coast League and Arizona League. Unlike the complex leagues, Pioneer League teams charged admission and sold concessions. It was almost exclusively the first fully professional league in which many players competed; most of the players had just been signed out of high school. It was a short-season league that competed from late June (when Major League teams signed players whom they selected in the amateur draft) to early September.
After the 2018 season, the Helena Brewers relocated to Colorado Springs, Colorado, where they became the Rocky Mountain Vibes.
As the start of the 2020 season was postponed due to the COVID-19 pandemic before being cancelled on June 30, making the 2019 season the league's last as an MLB-affiliated league of Minor League Baseball.
In conjunction with the reorganization of Minor League Baseball in 2021, the Pioneer League was converted to an independent baseball league and was granted status as an MLB Partner League. The reconfigured league continued with the same franchises using the same identities, with the exception of the Orem Owlz who relocated to Windsor, Colorado, as the Northern Colorado Owlz. The Boise Hawks also joined the Pioneer League in 2021 after moving from the Northwest League.
The Pioneer League announced a five-year naming rights deal between the league and ticket vendor TicketSmarter that would have the league go as The Pioneer Baseball League presented by TicketSmarter starting in time for the 2022 season.
On April 10, 2024, Kelsie Whitmore signed with the Oakland Ballers of the Pioneer League. She became the first woman to play for that league later that year. On June 6, 2024, she became the first female player to start a Pioneer League game. In that game she struck out one batter. The league further expanded into California for its 2026 season, adding teams in Long Beach and Modesto – the latter as a replacement for the Modesto Nuts of the California League, who moved to San Bernardino and became the Inland Empire 66ers. Simultaneously, the league's presence in Colorado came to an abrupt end, after both the Rocky Mountain Vibes and short-lived Colorado Springs Sky Sox folded, and the Grand Junction Jackalopes relocated.
Teams
|mark-title1=Billings Mustangs |mark-description1=Dehler Park |mark-coord1=
|mark-title2=Boise Hawks |mark-description2=Memorial Stadium |mark-coord2=
|mark-title3=Glacier Range Riders |mark-description3=Glacier Bank Park |mark-coord3=
|mark-title4=Great Falls Voyagers |mark-description4=Centene Stadium |mark-coord4=
|mark-title5=Idaho Falls Chukars |mark-description5=Melaleuca Field |mark-coord5=
|mark-title6=Long Beach Coast |mark-description6=Blair Field |mark-coord6=
|mark-title7=Missoula PaddleHeads |mark-description7=Ogren Park at Allegiance Field |mark-coord7=
|mark-title8=Modesto Roadsters |mark-description8=John Thurman Field |mark-coord8=
|mark-title9=Oakland Ballers |mark-description9=Raimondi Park |mark-coord9=
|mark-title10=Ogden Raptors |mark-description10=Lindquist Field |mark-coord10=
|mark-title11=Yuba-Sutter High Wheelers |mark-description11=Bryant Field |mark-coord11=
| Team | Location | Stadium | Cap. | First | Billings Mustangs | Boise Hawks | Glacier Range Riders | Great Falls Voyagers | Idaho Falls Chukars | Long Beach Coast | Missoula PaddleHeads | Modesto Roadsters | Oakland Ballers | Ogden Raptors | Yuba-Sutter High Wheelers | TBD Travel Team |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Billings, Montana | Dehler Park | 3,071 | 1948 | |||||||||||||
| Boise, Idaho | Memorial Stadium | 3,452 | 2021 | |||||||||||||
| Kalispell, Montana | Glacier Bank Park | 2,500 | 2022 | |||||||||||||
| Great Falls, Montana | Centene Stadium | 4,000 | 1948 | |||||||||||||
| Idaho Falls, Idaho | Melaleuca Field | 3,400 | 1940 | |||||||||||||
| Long Beach, California | Blair Field | 3,238 | 2026 | |||||||||||||
| Missoula, Montana | Ogren Park at Allegiance Field | 5,000 | 1939 | |||||||||||||
| Modesto, California | John Thurman Field | 4,000 | 2026 | |||||||||||||
| Oakland, California | Raimondi Park | 4,000 | 2024 | |||||||||||||
| Ogden, Utah | Lindquist Field | 8,700 | 1977 | |||||||||||||
| Marysville, California | Bryant Field | 4,000 | 2024 | |||||||||||||
| 2026 |
- Boise Pilots / Boise Yankees / Boise Braves (1939–1963)
- Lewiston Indians (1939)
- Ogden Reds (1939–1955)
- Pocatello Cardinals / Pocatello Bannocks / Pocatello A's / Pocatello Giants / Pocatello Chiefs / Ogden Dodgers / Ogden Spikers / Lethbridge Expos / Lethbridge Dodgers / Pocatello Gems / Gate City Pioneers / Pocatello Pioneers / Lethbridge Mounties / Lethbridge Black Diamonds / Missoula Osprey / Missoula PaddleHeads (1939–present)
- Salt Lake City Bees / Salt Lake City Giants (1939–1957; 1967–1969)
- Twin Falls Cowboys / Magic Valley Cowboys (1939–1971)
- Idaho Falls Russets / Idaho Falls Yankees / Idaho Falls Angels / Idaho Falls A's / Idaho Falls Eagles / Idaho Falls Braves / Idaho Falls Gems / Idaho Falls Padres / Idaho Falls Chukars (1940–present)
- Billings Mustangs (1948–present)
- Great Falls Electrics / Great Falls Selectrics / Great Falls Dodgers / Great Falls Giants / Great Falls Dodgers / Great Falls White Sox / Great Falls Voyagers (1948–present)
- Missoula Timberjacks (1956–1960)
- Treasure Valley Cubs / Caldwell Cubs (1964–1971)
- Calgary Cardinals / Calgary Expos / Salt Lake City Trappers / Pocatello Posse / Ogden Raptors (1977–present)
- Medicine Hat A's / Medicine Hat Blue Jays / Helena Brewers / Rocky Mountain Vibes (1977–2025)
- Butte Copper Kings / Casper Rockies / Casper Ghosts / Grand Junction Rockies / Grand Junction Jackalopes (1978–2025)
- Helena Phillies / Helena Gold Sox / Helena Brewers / Provo Angels / Orem Owlz / Northern Colorado Owlz (1978–2025)
- Boise Hawks (2021–present)
- Glacier Range Riders (2022–present)
- Oakland Ballers (2024–present)
- Yolo High Wheelers / Yuba-Sutter High Wheelers (2024–present)
- Colorado Springs Sky Sox (2025)
- Long Beach Coast (2026–present)
- Modesto Roadsters (2026–present)
Timeline of franchises (1939–present)
DateFormat = mm/dd/yyyy ImageSize = width:1600 height:auto barincrement:25 PlotArea = right:0 left:0 bottom:60 top:0 Period = from:01/01/1938 till:10/01/2027 TimeAxis = orientation:horizontal Legend = orientation:vertical Colors = id:league value:rgb(0.83,0.92,0.96) Legend:Playing_in_Pioneer_League id:nonleague value:rgb(0.97,0.97,0.69) Legend:Playing_in_another_league id:grid value:rgb(0.6,0.6,0.6) ScaleMajor = gridcolor:grid unit:year increment:2 start:01/01/1939 ScaleMinor = gridcolor:grid unit:year increment:1 start:01/01/1939 PlotData = width:15 textcolor:black shift:(5,-5) anchor:from fontsize:s bar:1 color:league from:01/22/1939 till:12/10/1942 text:"Boise Pilots" bar:1 color:league from:01/22/1946 till:12/10/1951 bar:1 color:league from:01/22/1952 till:12/10/1953 text:"Yank." bar:1 color:league from:01/22/1954 till:12/10/1954 text:"P." bar:1 color:league from:01/22/1955 till:12/10/1963 text:"Boise Braves" bar:2 color:league from:01/22/1939 till:12/10/1939 text:"Lewiston Indians" bar:3 color:league from:01/22/1939 till:12/10/1942 text:"Ogden Reds" bar:3 color:league from:01/22/1946 till:12/10/1955 bar:4 color:league from:01/22/1939 till:12/10/1942 text:"Pocatello Cardinals" bar:4 color:league from:01/22/1946 till:12/10/1951 bar:4 color:league from:01/22/1952 till:12/10/1956 text:"Bannocks" bar:4 color:league from:01/22/1957 till:12/10/1959 text:"A's" bar:4 color:league from:01/22/1960 till:12/10/1960 text:"G." bar:4 color:league from:01/22/1961 till:12/10/1961 text:"B." bar:4 color:league from:01/22/1962 till:12/10/1965 text:"Chiefs" bar:4 color:league from:01/22/1966 till:12/10/1973 text:"Ogden Dodgers" bar:4 color:league from:01/22/1974 till:12/10/1974 text:"S." bar:4 color:league from:01/22/1975 till:12/10/1976 text:"Exp." bar:4 color:league from:01/22/1977 till:12/10/1983 text:"Lethbridge Dodgers" bar:4 color:league from:01/22/1984 till:12/10/1987 text:"P. Gems" bar:4 color:league from:01/22/1988 till:12/10/1989 text:"P. Gi." bar:4 color:league from:01/22/1990 till:12/10/1990 text:"G." bar:4 color:league from:01/22/1991 till:12/10/1991 text:"P." bar:4 color:league from:01/22/1992 till:12/10/1995 text:"L. Mounties" bar:4 color:league from:01/22/1996 till:12/10/1998 text:"Black Di." bar:4 color:league from:01/22/1999 till:12/10/2019 text:"Missoula Osprey" bar:4 color:league from:01/22/2020 till:end text:"Missoula PaddleHeads" bar:5 color:league from:01/22/1939 till:12/10/1942 text:"Salt Lake City Bees" bar:5 color:league from:01/22/1946 till:12/10/1957 bar:5 color:nonleague from:01/22/1958 till:12/10/1965 bar:5 color:league from:01/22/1967 till:12/10/1968 text:"Gian." bar:5 color:league from:01/22/1969 till:12/10/1969 text:"Salt Lake City Bees" bar:5 color:nonleague from:01/22/1970 till:12/10/1984 bar:6 color:league from:01/22/1939 till:12/10/1942 text:"Twin Falls Cowboys" bar:6 color:league from:01/22/1946 till:12/10/1951 bar:6 color:league from:01/22/1952 till:12/10/1958 text:"Magic Valley Cowboys" bar:6 color:league from:01/22/1961 till:12/10/1966 bar:6 color:league from:01/22/1968 till:12/10/1971 bar:7 color:league from:01/22/1940 till:12/10/1942 text:"Idaho Falls Russets" bar:7 color:league from:01/22/1946 till:12/10/1961 bar:7 color:league from:01/22/1962 till:12/10/1965 text:"Yankees" bar:7 color:league from:01/22/1966 till:12/10/1981 text:"Idaho Falls Angels" bar:7 color:league from:01/22/1982 till:12/10/1984 text:"A's" bar:7 color:league from:01/22/1985 till:12/10/1985 text:"E." bar:7 color:league from:01/22/1986 till:12/10/1991 text:"Idaho Falls Braves" bar:7 color:league from:01/22/1992 till:12/10/1992 text:"G." bar:7 color:league from:01/22/1993 till:12/10/1999 text:"Idaho Falls Braves" bar:7 color:league from:01/22/2000 till:12/10/2003 text:"Padres" bar:7 color:league from:01/22/2004 till:end text:"Idaho Falls Chukars" bar:8 color:league from:01/22/1948 till:12/10/1963 text:"Billings Mustangs" bar:8 color:league from:01/22/1969 till:end bar:9 color:league from:01/22/1948 till:12/10/1948 text:"E." bar:9 color:league from:01/22/1949 till:12/10/1950 text:"Sele." bar:9 color:league from:01/22/1951 till:12/10/1956 text:"Great Falls Electrics" bar:9 color:league from:01/22/1957 till:12/10/1957 text:"D." bar:9 color:league from:01/22/1958 till:12/10/1963 text:"Great Falls Electrics" bar:9 color:league from:01/22/1969 till:12/10/1983 text:"Great Falls Giants" bar:9 color:league from:01/22/1984 till:12/10/2002 text:"Great Falls Dodgers" bar:9 color:league from:01/22/2003 till:12/10/2007 text:"White Sox" bar:9 color:league from:01/22/2008 till:end text:"Great Falls Voyagers" bar:10 color:league from:01/22/1956 till:12/10/1960 text:"Missoula Timberjacks" bar:11 color:league from:01/22/1964 till:12/10/1966 text:"TV Cubs" bar:11 color:league from:01/22/1967 till:12/10/1971 text:"Caldwell Cubs" bar:12 color:league from:01/22/1977 till:12/10/1978 text:"Card." bar:12 color:league from:01/22/1979 till:12/10/1984 text:"Calgary Expos" bar:12 color:league from:01/22/1985 till:12/10/1992 text:"Salt Lake City Trappers" bar:12 color:league from:01/22/1993 till:12/10/1993 text:"P." bar:12 color:league from:01/22/1993 till:12/10/1993 text:"P." bar:12 color:league from:01/22/1994 till:end text:"Ogden Raptors" bar:13 color:nonleague from:01/22/1974 till:12/10/1976 bar:13 color:league from:01/22/1977 till:12/10/1977 text:"A." bar:13 color:league from:01/22/1978 till:12/10/2002 text:"Medicine Hat Blue Jays" bar:13 color:league from:01/22/2003 till:12/10/2018 text:"Helena Brewers" bar:13 color:league from:01/22/2019 till:12/10/2025 text:"Rocky Mountain Vibes" bar:14 color:league from:01/22/1978 till:12/10/1985 text:"Butte Copper Kings" bar:14 color:league from:01/22/1987 till:12/10/2000 bar:14 color:league from:01/22/2001 till:12/10/2007 text:"Casper Rockies" bar:14 color:league from:01/22/2008 till:12/10/2011 text:"Ghosts" bar:14 color:league from:01/22/2012 till:12/10/2022 text:"Grand Junction Rockies" bar:14 color:league from:01/22/2023 till:12/10/2025 text:"Jackalop." bar:15 color:league from:01/22/1978 till:12/10/1983 text:"Helena Phillies" bar:15 color:league from:01/22/1984 till:12/10/1986 text:"Gold S." bar:15 color:league from:01/22/1987 till:12/10/2000 text:"Helena Brewers" bar:15 color:league from:01/22/2001 till:12/10/2004 text:"Angels" bar:15 color:league from:01/22/2005 till:12/10/2020 text:"Orem Owlz" bar:15 color:league from:01/22/2022 till:12/10/2024 text:"N.C. Owlz" bar:16 color:nonleague from:01/22/1969 till:12/10/2020 bar:16 color:league from:01/22/2021 till:end text:"Boise Hawks" bar:17 color:league from:11/22/2015 till:12/10/2021 text:"Glacier Range Riders" bar:17 color:league from:01/22/2022 till:end bar:18 color:white from:05/22/2019 till:12/10/2023 text:"Oakland Ballers" bar:18 color:league from:01/22/2024 till:end bar:19 color:white from:05/22/2018 till:12/10/2023 text:"Yolo High Wheelers" bar:19 color:league from:01/22/2024 till:end bar:20 color:white from:09/22/2017 till:12/10/2024 text:"Colorado Springs Sky Sox" bar:20 color:league from:01/22/2025 till:12/10/2025 bar:21 color:white from:09/22/2020 till:12/10/2025 text:"Long Beach Coast" bar:21 color:league from:01/22/2026 till:end bar:22 color:white from:06/22/2020 till:12/10/2025 text:"Modesto Roadsters" bar:22 color:league from:01/22/2026 till:end bar:23 color:white from:01/01/1938 till:12/01/1938
Champions
Main article: List of Pioneer League champions
League champions have been determined by different means since the Pioneer League's formation in 1939. There were postseason playoffs when the league operated as Class C (1939–1962), except for 1939 and 1956, and for the three years during World War II when the league did not operate. In the league's one year as Class A (1963), there were also postseason playoffs. After becoming a Rookie league in 1964, the league champions were simply the regular season pennant winners through 1977. Since 1978, postseason playoffs have again been held to determine a league champion.
References
References
- "Pioneer League: Attendance (2016)". Minor League Baseball.
- "Pioneer League: Attendance (2015)". Minor League Baseball.
- (June 13, 2018). "New Name on Tap for Colorado Springs Pioneer League Team". August Publications.
- (March 13, 2020). "A Message From Pat O'Conner". Minor League Baseball.
- (June 30, 2020). "2020 Minor League Baseball Season Shelved". Minor League Baseball.
- (November 30, 2020). "Pioneer League named MLB Partner League". Major League Baseball.
- Kirk, Alexander. (November 30, 2020). "Orem Owlz announce move to Windsor in 2021". [[KUSA (TV).
- Kloppenburg, Katie. (December 9, 2020). "Boise Hawks plan to join Pioneer Baseball League in 2021".
- (January 26, 2022). "Pioneer League, TicketSmarter unveil naming-rights deal". August Publications.
- (April 10, 2024). "Oakland Ballers sign team's first female player".
- Lockard, Melissa. "Kelsie Whitmore first woman to start Pioneer League game".
- (September 18, 2025). "Fans get to choose new Modesto baseball team's name. Here's when they'll start".
- (September 2, 2025). "Long Beach community can help name city's new professional baseball team".
- (October 30, 2025). "The Rocky Mountain Vibes baseball team is leaving Colorado Springs".
- (September 9, 2025). "Pioneer League notebook: Grand Junction relocating; Ogden, league stat leaders".
- (September 10, 2025). "What led to the Grand Junction Jackalopes relocating".
- (December 17, 2025). "Pioneer Baseball League Announces 2026 Season Schedule".
- "Pioneer League Champions". Minor League Baseball.
- (2007). "Encyclopedia of Minor League Baseball". Baseball America.
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