Kitchen turned pro in 2021 with Monster Energy Star Racing Yamaha. He raced in six AMA motocross events with a best finish of eighth.
Kitchen started the 250 East championship with a ninth in Minneapolis, but crashed in Arlington and was out for the rest of the season. He raced half of the motocross season with good results, gaining a moto win and an overall podium. He then broke his arm in a practice crash, but was able to return for the final round.
Kitchen raced in the west division this year and won his first professional supercross race at Anaheim 2, which was a triple crown event.[2] He achieved three more podiums and ended the supercross season 3rd in points.
Kitchen had a strong, complete outdoor season. He finished Motocross with three podium finishes and ended fifth in the championship.
In the inaugural SuperMotocross Championship, Kitchen went seventh, eighth, and fifth, with a moto win at the final round, to finish fourth overall.
On October 2, 2023, Kitchen announced his departure from Star Yamaha to Pro Circuit Kawasaki.[3]
Kitchen again raced the west division in Supercross and put on a strong battle for the championship, finishing in the top-five every race except for Nashville and gaining three wins. It came down to the final race in Salt Lake City, but he was edged out by R.J. Hampshire by five points for the championship.
Kitchen again had a strong outdoor season, staying inside the top-ten and gaining three wins and two other podiums. He finished third in the championship.
Kitchen put a charge in for the SuperMotocross championship, finishing third, fourth, and eighth for sixth overall.
Kitchen came prepared to race the Supercross season in the West division, however, he got sick the day of the Anaheim 1 race and pulled out to race the East division. After some bad luck in the first round in Tampa, he rebounded to take the win in Detroit after a red flag restart. While riding well in Daytona, he crashed hard and sustained a broken collarbone and multiple fractures in his back. After recovering, he set his sights on preparing for outdoors.