Check this out, James Harrison ... there's a defensive lineman who's throwing around a ridiculous amount of weight in the gym ... and it's super impressive.
Myles Garrett did his best impression of the former Steelers superstar on Thursday ... posting a video of himself squatting what appears to be about 465 pounds with a trap bar -- multiple times!!!
Oh ... and for some of the reps, he's wearing a big ass weighted vest.
Now, Garrett lifting heavy weights ain't exactly breaking news .