Guys who specialize in picking up heavy things and usually nothing else. Usually power lifters have special gear, which I don't think that football players would be using because the purpose of squatting isn't just to squat, it is to be good at football.

WR for raw squat was 854 until this year, and is now 914. The drug tested raw squat WR is currently 859.

And again, power lifters don't do weight training as a cross training for something else. They don't train their aerobic capacity. The record holders in individual lifts typically don't train as hard on their other lifts. You're not going to see someone with a squat close to WR levels that can also bench close to WR levels.