Your proof of this is what, an article in Flex?
worse
it came out of that now defunct vince mcmahon wbf bullshit.
they held a squat off comp between dr squat, fred hatfield and tom in response to ifbb athletes, zuccoloto and quinn's curl fest. they selected a maximum lift and reps comp.
surpise suprise, tom won the reps part, fred won the max and it was subsequently declared a draw (like quinn and zuke).
excactly the same concept as the ifbb event, the weights were nowhere near that of the claims and tom's previously claimed max of 600 oddlbs whilst in his peak was bettered by over 100lbs despite being nowhere near the same condition or size he was when he did 600lbs.
same with fred. he was also long retired and looked like a different person in terms of comparison with his peak (when he squatted the world record of the time).