Powerful

...

Who would win a fight, Jenner or Gibson?

In their respective primes or now? Respective primes I'd give it to Bruce, Mel was small at that time, he's gotten bigger since then. Now obviously Mel would curbstomp the tranny weirdo.

Buckle up

Put this ugly freak in the nuthouse where he/she/it belongs

Let's assume boxing rules:

Jenner: 68 years 6'2" 194lb
Gibson: 62 years 5'10 214lb

Jenner has Mel on reach, speed, and I imagine agility.
Gibson has Jenner on Power, age, and toughness.

Mel has that berserker rage inside him, he'd tear out bruce's throat

why does he look so angry?

This post was more amusing to me than it should've been

I appreciate your approach but I think this goes a bit beyond the rote numbers. Jenner was an actual athlete performing at an olympic level. Mel was handsome in his youth and is a little stocky these days. If nobody knocks each other out in the first 20 seconds like most real-life fights, Mel is going to be winded as fuck and out of breath shortly after.