Three-time NASCAR champion Tony Stewart broke his right leg in a sprint car race Monday night at the Southern Iowa Speedway in Oskaloosa and will miss this weekend's road course race at Watkins Glen.

A spokesman for Stewart said the driver broke his right tibia and fibula and had surgery after he was transported to a local hospital.

Stewart was leading the 30-lap feature in a 360 winged sprint car with five laps remaining when a lapped car spun in Turn 4 and collected Stewart and two others.

It's the third time Stewart has wrecked in the last month while competing in extracurricular races.

Stewart-Haas Racing did not immediately announce a replacement driver for Stewart's No. 14 Chevrolet at Watkins Glen.