There have been just five heel hook stoppages in UFC heavyweight history – and Walker has two of them, and in back-to-back fights. Perhaps even more disconcerting for potential future opponents ...

Heel hooks are few and far between in the heavyweight weight class. But for the second fight in a row, Valter Walker used the maneuver to end a fight. At Saturday's UFC Fight Night 251 ...

Walker (13-1 MMA, 2-1 UFC), brother of UFC light heavyweight Johnny Walker, submitted Don'Tale Mayes (11-8 MMA, 4-6 UFC) at UFC Fight Night 251 – and he did it in a hurry. Just 77 seconds in, the ...