As predictable as the sun rises

That mofo never benched and squatted 350 and 500 at 15. HAHAHAHAHAHAHA.
Twas what he told me, Rob.
I have no doubt his squat was a klick high, but after three years of training, I have little reason to believe a genetic freak like Mentzer could flat bench 350. As I recall, that was the same year he'd gorged himself up to a very fat 250, believing some Weider supplement bullshit about gaining a lb. of muscle daily. (He later noted that he had to diet for a year to get the flab off.)
Besides, you speak as if a 15-year-old kid couldn't come anywhere close to those weights. You base this on...what, exactly? After lifting for almost two years, I benched 245 with a pause, and I was very lean at the time, maybe 155. A year later, I was closing on 300, and I rarely trained below five reps. VERY fat guys at other local high schools were pressing in the low threes, or so second-hand accounts said.
Mike was in another class vis a vis building strength and muscle. Maybe he was bullshitting me? To what purpose, I cannot say. Bragging about easy gains as a youngster whilst doing something he thought incompatible with Heavy Duty...doesn't seem to fit his sales pitch, nay?
His and his brother’s squats were mile-high and performed in power cages with the safety rails set. Partial reps in the extreme. I’ve heard them described by folks who were THERE.
Congratulations

. That is a total red herring, but I'm well aware of Ray's talk about squatting 920 (ish?) "raw." I know it's bullshit.
At 15, Mike would have sat on his heels with 500 ... and never came back up with the bar still on his back.
It’s like the nonsense that Arnold could press 500.
At his most gassed, he was good for a few reps in the early 400s.
Anyway, I digress ...
I met Mike in the mid-nineties and he was totalled. All fucked up.
Aww, come on...a few reps with low fours at his prime? He was stronger than that. Any hard trainer should be able to bury 440ish for a few after a good cycle or two.
I appreciate your insights and efforts to cut through the outright lies and nonsense, but I honestly think you're barking up the wrong tree this time, my good man.