The pair fought back at UFC 116 in July of 2010 to unify the UFC heavyweight championship which was held by Lesnar, and the interim UFC heavyweight championship which was held by Carwin. Ultimately Lesnar won via 2nd round submission after being taken into deep waters earlier in the fight.
A fan who was re-watching the fight Tweeted Carwin, saying that he believed the fight should have been stopped in favor of Carwin when Lesnar was not intelligently defending himself.
Carwin responded, and took aim at Lesnar:
— el Duderino (@STALINSLAPSHOS) January 22, 2016
In the refs defense Brock wasn't intelligent to start with
— Shane Carwin (@ShaneCarwin) January 22, 2016