A heavyweight contenders fight between prospects Shane Carwin and Cain Velasquez could serve as the co-main event for UFC 103 on September 19th in Dallas, sources have told Inside Fights.

The bout, which has not been agreed to, could potentially serve as the co-main event alongside a welterweight bout between Texas native Mike Swick and future UFC Hall of Famer Matt Hughes. The heavyweight fight would elevate either Carwin or Velasquez into instant contendership for the heavyweight title, and a win by Swick would make him the number one contender to Georges St. Pierre’s welterweight championship.

Another fight that has been discussed internally is Chuck Liddell facing Rich Franklin. Dana White has seemingly accepted the idea that Chuck is going to want another fight, and he would much rather have Liddell inside the UFC cage than to have him go and be a huge drawing card for Strikeforce or Affliction.

We’ll have more on this story in the near future.

UPDATE: Shane Carwin says he hasn’t been contacted about the Velasquez fight. We’re still a few months from the show, so it isn’t surprising that he hasn’t heard of the fight yet.

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Tags: Cain Velasquez, Chuck Liddell, Rich Franklin, shane carwin, ufc 103