2015 Seattle Mariners season

The 2015 Seattle Mariners season was the 39th season in franchise history. The Mariners played their 16th full season (17th overall) at Safeco Field and finished the season with a record of 76–86.

The Mariners signed slugger Nelson Cruz in the offseason and expected to contend. However, the team fell under .500 for good in May. The team fired general manager Jack Zduriencik on August 28. During his seven-year tenure in Seattle, the Mariners had the fifth-worst record in baseball. After Jeff Kingston served as interim general manager, the team hired Jerry Dipoto on September 28. Manager Lloyd McClendon was fired in October.

The Mariners played 23 extra-inning games during the season, the most of any MLB team in 2015.

• December 1, 2014: Nelson Cruz signed a four-year, $57 million contract.
• December 3: Traded Michael Saunders to the Toronto Blue Jays for J. A. Happ.
• December 30: Traded Brandon Maurer to the San Diego Padres for Seth Smith.
• January 15, 2015: Received Mike Kickham in a year with the Chicago Cubs for Lars Huijer.
• January 22: Shawn O'Malley signed a minor league contract.
• January 26: Endy Chávez and Franklin Gutiérrez signed minor league contracts.
• February 13: Rickie Weeks Jr. signed a one-year, $2 million contract.
• March 31: Traded Erasmo Ramírez to the Tampa Bay Rays for Mike Montgomery.
• April 2: Joe Beimel signed a minor league contract. The Mariners also acquiredTony Zych from the Cubs for $1.

Nelson Cruz was an All-Star and Silver Slugger in 2015

On April 19, newly signed Nelson Cruz hit a walk-off single and two home runs against his former team, the Texas Rangers, as part of a five-run comeback. Cruz was named the American League (AL) Player of the Month in April. On May 27, Cruz hit a three-run home run into the stingray tank at Tropicana Field to sweep the Tampa Bay Rays and move the Mariners up to .500.

Rookie starting pitcher Mike Montgomery threw consecutive shutouts in June, besting the Kansas City Royals and San Diego Padres.

Cruz and Félix Hernández were named to the MLB All-Star Game.

The Mariners turned a triple play against the Toronto Blue Jays on July 26. Hisashi Iwakuma threw a no-hitter on August 12 against the Baltimore Orioles.

On August 28, general manager (GM) Jack Zduriencik was fired. Jeff Kingston was named interim GM, with Jerry Dipoto hired for the role a month later. Dipoto fired manager Lloyd McClendon after the season.

Cruz won his first Silver Slugger Award.

 8 Willie Bloomquist 22 Robinson Canó  4 Ketel Marte  5 Brad Miller 63 Jesús Montero 20 Logan Morrison 15 Kyle Seager  1 Chris Taylor 35 Mark Trumbo 25 Rickie Weeks | | Outfielders

13 Dustin Ackley 23 Nelson Cruz 30 Franklin Gutiérrez 16 Austin Jackson 99 James Jones 36 Shawn O'Malley 17 Stefen Romero 12 Justin Ruggiano  7 Seth Smith | | Manager 23 Lloyd McClendon Coaches

26 Rich Donnelly (third base) 45 Trent Jewett (bench) 11 Edgar Martínez (hitting) 62 Jason Phillips (bullpen catcher) 88 Chris Prieto (quality control) 48 Mike Rojas (bullpen) 43 Andy Van Slyke (assistant hitting coach) 47 Rick Waits (pitching) 28 Chris Woodward (first base) |

Through October 4, 2015

Note: G = Games played; AB = At bats; R = Runs scored; H = Hits; 2B = Doubles; 3B = Triples; HR = Home runs; RBI = Runs batted in; BB = Base on balls; SO = Strikeouts; AVG = Batting average; SB = Stolen bases

Note: W = Wins; L = Losses; ERA = Earned run average; G = Games pitched; GS = Games started; SV = Saves; IP = Innings pitched; H = Hits allowed; R = Runs allowed; ER = Earned runs allowed; HR = Home runs allowed; BB = Walks allowed; K = Strikeouts

• 2015 Seattle Mariners season Official Site Archived October 9, 2012, at the Wayback Machine
• 2015 Seattle Mariners season at ESPN
• 2015 Seattle Mariners season at Baseball Reference