Following yesterday's AAA Texas 500 at Texas Motor Speedway, NASCAR stars Jeff Gordon and Brad Keselowski and their teams were involved in a post-race brawl that left both drivers bloodied.

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The melee started when Gordon confronted Keselowski on pit row, blaming him for a collision that knocked him out of the race, which was won by Jimmie Johnson, and hurt Gordon's chances in the Chase for the Sprint Cup.

Gordon said - among other things - that he doesn't know how Keselowski ever won a championship.

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This brawl comes just four weeks after Keselowski was involved in an incident with Matt Kenseth, who similarly blamed Keselowski for knocking him out of a race at Charlotte Motor Speedway.

See Gordon and Keselowski and their teams brawl in the clip above and watch Patti Ann Browne's report from "Happening Now" below.

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