It doesn't seem like an injury that could keep him out for any significant length of time, but everyone's collective breath will probably be held anyway.
Dominick Cruz said on the Fox Sports 1 post-fight show that he felt a pop in his heel during the fifth round against T.J. Dillashaw on Saturday night in the main event of UFC Fight Night 81 in Boston. That explains the limp he was showing as the fight ended.
"It's extremely painful," Cruz said. "That's the best way I can put it. That's why I started limping a little bit.