Shane Carwin is retired, and was already defeated by Brock Lesnar when Lesnar was already champion. Carwin was also repeatedly injured at the end of his career, and had to drop out of a big fight with Roy Nelson. Not to mention he was dogged by steroid accusations. That hasn't stopped him for calling for a second fight with Lesnar. Saying he's "all in" for another fight with Lesnar, Carwin reflected on his first loss to the now-former champion on Fox Sports, saying;
In the second round, anybody could have tripped me and landed on me I should have let him up and kept punching him in the head.
That claim is questionable, and the fact is, Lesnar beat him fair and square - but fans would still tune in for a rematch.