Shane Carwin has re-injured his knee and will not be able to face Roy Nelson next month at The Ultimate Fighter Finale 16. UFC president Dana White made the announcement via Twitter on Wednesday.

Carwin mentioned a knee injury suffered in training shortly after filming for TUF, but expected to be able to fight through it. It’s unknown if this is the same injury, a new one, or just further damage from trying to train through the initial injury.

Nelson is expected to remain on the card in the main event slot.