Terrance McKinney

Terrance McKinney made the loudest possible first impression: a seven-second knockout in his UFC debut, one of the fastest finishes the promotion has ever seen. It set the tone for a career built on explosiveness and early violence.

McKinney is boom-or-bust in the best and most nerve-wracking sense. When he connects early, the fight is over in a flash; when he doesn't, his all-out style can leave him vulnerable. That volatility has produced a run of quick wins and quick losses in a brutally deep lightweight division.

For fans, that's exactly the appeal. A McKinney fight is rarely a slow burn, and the threat of a sudden, spectacular ending is always there.