Tony Stewart has 4th surgery on right leg

LAS VEGAS (AP) Tony Stewart has undergone a fourth surgery on the leg he broke last year during a sprint car race in Iowa.

Stewart was released from the hospital on Wednesday. He was then headed to Las Vegas to celebrate Stewart-Haas Racing teammate Kevin Harvick's championship.

Stewart broke the tibia and fibula in his right leg during the Aug. 5, 2013, crash and underwent two surgeries immediately after the accident, including one to insert a metal rod inside the tibia.

A third surgery last year was to close a wound on his shin. Stewart spokesman Mike Arning called Monday's surgery in Charlotte, North Carolina, the equivalent of routine maintenance.