2017 Alsco 300

The 2017 Alsco 300 was the 16th stock car race of the 2017 NASCAR Xfinity Series season and the 17th iteration of the event. The race was held on Friday, July 7, 2017, Sparta, Kentucky, at Kentucky Speedway, a 1.5 miles (2.4 km) permanent tri-oval racetrack. Due to inclement weather, the remainder of the race was held on Saturday, July 8. The race took the scheduled 200 laps to complete. At race's end, Kyle Busch, driving for Joe Gibbs Racing, scored his 88th career win in the xfinity series. He would hold off Ryan Blaney and Erik Jones for the win.

• (R) denotes rookie driver.
• (i) denotes driver who is ineligible for series driver points.

Practice was held on Thursday, July 6, at 2:00 PM EST. The session would last for 55 minutes. Kyle Busch of Joe Gibbs Racing would set the fastest time in the session, with a lap of 29.607 and an average speed of 182.389 mph (293.527 km/h).

Second and final practice was cancelled due to inclement weather. Qualifying was held on Friday, July 7, at 4:30 PM EST. Since Kentucky Speedway is under 2 miles (3.2 km) in length, the qualifying system was a multi-car system that included three rounds. The first round was 15 minutes, where every driver would be able to set a lap within the 15 minutes. Then, the second round would consist of the fastest 24 cars in Round 1, and drivers would have 10 minutes to set a lap. Round 3 consisted of the fastest 12 drivers from Round 2, and the drivers would have 5 minutes to set a time. Whoever was fastest in Round 3 would win the pole.

Kyle Busch of Joe Gibbs Racing would win the pole after advancing from both preliminary rounds and setting the fastest lap in Round 3, with a time of 29.681 and an average speed of 181.935 mph (292.796 km/h).

Morgan Shepherd, Quin Houff, and Brandon Brown would fail to qualify.

Stage 1 Laps: 45

Stage 2 Laps: 45

Stage 3 Laps: 110