What happened: Johnny Walker made a successful jump to the heavyweight division, defeating Mick Parkin via knockout in the first round of the UFC 332 prelims. The bout ended at 3:35 after Walker connected with a flush knee. “When I finish the fight, I conquer my objective,” Walker said afterward.

Why it matters: The victory validates Walker's decision to abandon the 205-pound limit, a weight cut he recently said left him dizzy in sparring. Carrying his power up a weight class provides him a fresh start without the severe physical depletion.

What to watch: Walker will look to secure a ranked opponent as he attempts to climb the heavyweight ladder.