The 2014 TreatMyClot.com 300 was the fifth stock car race of the 2014 NASCAR Nationwide Series season, and the 18th iteration of the event. The race was held on Saturday, March 22, 2014, in Fontana, California, at Auto Club Speedway, a permanent D-shaped oval racetrack. The race took the scheduled 150 laps to complete. On the final restart with 16 to go, Kyle Larson, driving for Turner Scott Motorsports, would hold off fierce charges from the field to win his first career NASCAR Nationwide Series win and his first of the season. To fill out the podium, Kevin Harvick, driving for JR Motorsports, and Kyle Busch, driving for Joe Gibbs Racing, would finish second and third, respectively.
Auto Club Speedway (previously California Speedway) was a , low-banked, D-shaped oval superspeedway in Fontana, California which hosted NASCAR racing annually from 1997 to 2023. It was also used for open wheel racing events. The racetrack was located near the former locations of Ontario Motor Speedway and Riverside International Raceway. The track was owned and operated by International Speedway Corporation and was the only track owned by ISC to have its naming rights sold. The speedway was served by the nearby Interstate 10 and Interstate 15 freeways as well as a Metrolink station located behind the backstretch.
The first practice session was held on Friday, March 21, at 1:40 PM PST. The session would last for 50 minutes. Kyle Busch, driving for Joe Gibbs Racing, would set the fastest time in the session, with a lap of 41.342 and an average speed of .
The final practice session, sometimes referred to as Happy Hour, was held on Friday, March 21, at 3:00 PM PST. The session would last for one hour and 25 minutes. Ty Dillon, driving for Richard Childress Racing, would set the fastest time in the session, with a lap of 40.802 and an average speed of .
Qualifying was held on Saturday, March 22, at 10:40 AM PST. Since Auto Club Speedway is at least in length, the qualifying system was a multi-car system that included three rounds. The first round was 25 minutes, where every driver would be able to set a lap within the 25 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.
Elliott Sadler, driving for Joe Gibbs Racing, would win the pole after setting a time of 40.680 and an average speed of in the third round.
No drivers would fail to qualify.
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