Shane CarwinShane Carwin was set to fight Cain Velasquez at UFC 104 in October (though it was never officially announced), but it looks like there might be a change in plans. Multiple reports surfaced last night claiming that Carwin will instead fight Brock Lesnar for the UFC Heavyweight title on November 21 at UFC 106.

A small site called Minnesota MMA first broke the news on their twitter account, and shortly thereafter MMA Madness and Fighters Only Magazine both published reports confirming the news. Fighters Only also added that Cain Velasquez would get the winner.

Fighters Only has since been able to contact a well-placed source who has confirmed that the bout is “definitely” on.

The source also confirmed that Carwin has been pulled from a scheduled fight with Cain Velasquez at UFC 104.

Instead, Carwin will get a heavyweight title shot and Velasquez will be next in line after him, fighting the winner of Lesnar-Carwin.

Carwin addressed the reports on his website, but it seems he learned his lesson from letting the cat out of the bag a little too early with the Cain Velasquez news, because he’s not confirming or denying anything.

Lots of talk going around right now. It seems to stem from a twitter post out of MN. I can’t confirm or deny anything I can just tell you guys that I am training harder then ever and your support and loyalty will carry me through any fight they send my way. With you guys on my side I am ready for whatever happens. Stay tuned to the site or for any official news about me.

No reasons for the change have emerged yet. Maybe the UFC were putting together Carwin-Velasquez when they thought they would get Fedor? I don’t know, but hopefully this fight pans out. Besides Fedor, Carwin is the opponent I’d most like to see Brock take on. We’ve seen Lesnar beat ups guys smaller than him, but we haven’t seen how he handles fighting someone his own size. It will definitely be interesting to see what happens if these two freight trains collide.

Update: MMA Junkie is reporting that negotiations for the bout are currently underway, but nothing has been signed yet.

Update 2: The Lesnar-Carwin fight definitely looks like it’s going to happen because Cain Velasquez is now fighting Ben Rothwell at UFC 104. This now leaves Chase Gormley without an opponent for UFC 104.