week after his Xfinity start at Road America, Grala was called by RCR to substitute for Austin Dillon in their No. 3 NASCAR Cup Series car at the Daytona road course after Dillon tested positive for COVID-19. The Go Bowling 235 would see Grala finish seventh in his Cup debut. Grala joined Kaulig Racing in 2021 for a multi-race schedule that included the Daytona 500, driving the No. 16. At the 2021 Coke Zero Sugar 400 at Daytona, he suffered a foot injury from one of the race's accidents. Grala returned to the Truck Series again in 2021, driving for Young's Motorsports at the Daytona Road Course in their No. 02, replacing Kris Wright, the full-time driver of that truck. He joined Jordan Anderson Racing in 2021 for the Xfinity Series races at Road America event and Texas Motor Speedway in . On January 24, 2022, Alpha Prime Racing announced that Grala would drive for them in four races and be the team's reserve driver. On April 12, Big Machine Racing announced that he would drive for them at Talladega and Dover. Grala became The Money Team Racing's first official driver in the team's debut at the 2022 Daytona 500. On lap 40 of the race, he lost his right rear wheel and tire, but he finished the race in 26th place.On February 3, 2022, Young's Motorsports confirmed that Grala would return to the team to run 11 races in the team's No. 02 truck, sharing the ride with Jesse Little. 2023–present On December 8, 2022, Sam Hunt Racing announced that Grala would compete full-time for them in 2023, driving the No. 26 Toyota GR Supra, with sponsorship to be announced at a later date. Other racing In 2014, Grala ran in the Continental Tire SportsCar Challenge, where he became the youngest driver ever to compete in an International Motor Sports Association (IMSA) event at the age of 15 years and one week old. In 2016, Grala competed in his first Rolex 24 Hours of Daytona for Change Racing alongside former Rolex 24 winners Spencer Pumpelly and Justin Marks, in addition to race newcomer Corey Lewis; at the age of 17, Grala was the youngest driver in the field. On July 2, 2022, Grala won the Trans-Am Series TA/GT race at Road America, driving the No. 2 Technique Chassis Steel-It Weaver Racing Dodge Challenger. This was only Grala's second start