finale at Homestead-Miami Speedway, Truex dominated the first half of the race, winning the first stage and leading into green flag pit stops at the midpoint of stage 2. However, the race and championship hope unraveled due to a miscue during the pit stop, in which the left and right front tires were switched around, and installed to the incorrect sides. The pit road error forced an unscheduled stop and rendered Truex a lap down for much of the second stage. He recovered and began to rally back through the field, but could not overcome the loss of track position, ultimately finishing second in the race to teammate Kyle Busch and the final championship standings for the second season in a row. Truex led the series in victories with seven. Truex was also the first driver to lead the series in wins after switching to a new team since Matt Kenseth in 2013, who also did it with Joe Gibbs Racing. On December 9, after serving as Truex's crew chief for six seasons, Pearn announced he has parted ways with JGR to pursue opportunities outside the sport. 2020 At Martinsville in June, Truex controlled the final 100 laps and won his only race of the season after early-race damage to the front of his car prevented the right-front tire and brake pads from overheating. Truex dominated the final laps of the race at Kentucky but was the victim of a last-lap pass by Cole Custer, the second time in three years that Truex was passed on the final lap by a driver in their first career win. Truex missed the Championship 4 for the first time since 2016 and finished 7th in points. 2021: 5th Championship Four Appearance Despite only scoring one win in their first season paired together, Truex remained with crew chief James Small, even amidst a crew chief shakeup at JGR that year. He won his first race of the season at Phoenix in March, which was his first victory at the track. In March, Truex made his return to both the Xfinity Series and the Truck Series. He drove JGR's No. 54 at Atlanta in March for his first Xfinity start since 2010 when he drove multiple races for MWR in their No. 00 and No. 99 cars. Truex drove in the Truck Series' Bristol dirt race in the No. 51 for Kyle Busch Motorsports in