Johnny Walker Bulks Up for UFC 332 Heavyweight Debut

Johnny Walker will make his heavyweight debut this Saturday at UFC 332, telling MMA Fighting the punishing weight cuts to light heavyweight had been draining him in ways that had nothing to do with his conditioning. Walker faces UK heavyweight Mick Parkin (10-1) on the early prelims in Salt Lake City, and he says leaving 205 pounds behind should let him finally show what he can do on a full tank.

Walker burst into the UFC in 2019 winning his first three fights by knockout, each one earning a Performance of the Night bonus. He has gone 1-3-1 in his last five since, and the skid dropped him to the prelim slot for his move up in weight.

Why Is Johnny Walker Moving to Heavyweight?

Walker says the light heavyweight cut had gotten so severe that it was compromising his training camps, not just his fight-week weigh-ins. He told MMA Fighting that in the final weeks of camp he would go dark mid-sparring session, describing a dizziness and buzzing that forced him to stop and reset before continuing. He said it wasn't his heart or his breathing, just a depleted body shutting down on him. Walker says that problem is already gone at heavyweight. He described this camp as normal training, with no need to stop or wait, and said he now has full glycogen reserves heading into fight week.

The heavyweight move was actually supposed to happen back on August 1st in Belgrade, but an opponent injury pushed it back two months, giving Walker extra time to adjust to the new division before stepping in with Parkin.

Betting Angle

The market still likes Walker despite this being his first walk to the cage at heavyweight, with sportsbooks pricing him as a moderate favorite in the range of -145 to -150 over Parkin. That number reflects Walker's power and finishing pedigree more than any proven track record in the division, and it is worth remembering he is stepping in against a durable, unbeaten prospect who outsizes most opponents at 265 pounds. If the extra strength and recovery Walker is describing are real and not just fight-week talk, his ceiling at heavyweight could be higher than his light heavyweight run ever showed, especially in the first two rounds before any lingering questions about cardio at the new weight would surface. Bettors leaning Walker are essentially betting that a fresher, fully-fueled version of him is more dangerous than Parkin's size and unbeaten record, a bet that hinges on early finishing power given how thin the heavyweight sample size is for Walker right now.

Parkin, for his part, enters with nothing to lose and a chance to hand a well-known name his first loss at a new weight, the kind of live-dog spot that can carry appeal on the moneyline even at plus odds.

Frequently Asked Questions

Who is Johnny Walker fighting at UFC 332?

Johnny Walker faces unbeaten UK heavyweight Mick Parkin (10-1) in his heavyweight debut on the early prelims of UFC 332 in Salt Lake City.

Why did Johnny Walker move up to heavyweight?

Johnny Walker said the light heavyweight cut was leaving him depleted and dizzy during late-camp sparring sessions, and he expects to fight with much more energy and strength at heavyweight.

Was the Johnny Walker vs. Mick Parkin fight always scheduled for UFC 332?

No, the bout was originally set for August 1st in Belgrade but was pushed back after an opponent injury, landing it on the UFC 332 card instead.