He has raced in sports cars, Indy Pro Series, NASCAR, and Stadium Super Trucks.

His late father Aldo Andretti, Mario's twin brother, retired from driving race cars after nearly dying in an accident.

Andretti's racing career started in 1994 at the age of 15 with the help of his brother John, who helped Adam obtain a ride in the new half-scale Mini Cup Stock Car series, driving for Terry Lingner of Lingner Group Productions at the Velodrome in Indianapolis.

He also ran in the 24 Hours of Daytona, an event sponsored by the Grand American Road Racing Association.

[2] However, the team and Andretti failed to participate in any league-sponsored test sessions or enter any races.

In December 2017, Andretti joined UFD Racing for his Stadium Super Trucks debut at the Lake Elsinore Diamond in the No.

[5] Andretti returned to SST in August 2018 at Road America, where he finished eleventh and ninth in the weekend's two rounds.