Nascar Race Today

Three-time Sprint Cup champion Tony Stewart was involved in a four-car wreck Monday night and left the Southern Iowa Speedway in an ambulance, witnesses told FOX Sports.

Stewart was running a winged 360 c.i. sprinter in Oskaloosa with the American Sprint Car Series and was leading when a lapped car spun in front of him. Stewart hit the lapped car and his car flipped.

Witnesses said Stewart had to be helped from the car and had an apparent leg injury. He was put on a stretcher and taken to an ambulance. His condition was not immediately known.

Stewart's wreck continued a recent trend for the driver in sprint car races. He also flipped last week at Ohsweken Speedway in Ontario, Canada, and caused a multicar pileup at Canandaigua Motorsports Park on July 16.

"You mortals have got to learn," Stewart said after flipping at Ohsweken. "You guys need to watch more sprint car videos and stuff. It was not a big deal. It's starting to get annoying this week about that, so that was just an average sprint car wreck. When they wreck they get upside down like that. That was not a big deal."

Stewart is currently 11th in the Sprint Cup standings with one victory, putting him on the bubble for the Chase -- NASCAR's playoffs. The top 10 drivers qualify for the Chase along with the next two drivers in the top 20 who have the most wins.

Stewart was scheduled to compete Sunday in the Cheez-It 355 at Watkins Glen, one of five races remaining before the Chase begins.