Have you ever been in the weightroom of a top collegiate football team? I've seen a 160 pound defensive back do squats with 550 pounds. It's ludicrous. That said, most football players don't train for max deadlifts. They mostly do squats and cleans for power, which makes sense given the sport they're playing. Some of them do Romanians. Olympic-level strength is something that a lot of these guys could easily achieve if they trained specifically for lifting, but again, they're more concerned with pragmatic strength for a specific purpose.
The whole Larry Allen benching 700 pounds isn't as abnormal as you think. That same 160 pound db could 1RM bench 385, and he wasn't nearly the strongest guy on the team. I think you're also forgetting the fact that most of these guys have access to steroids, HGH, etc. Powerlifting as a sport doesn't tend to attract the people who would actually be the best powerlifters.
Players from U of Washington & Washington State train at my gym in the offseason, and just last week there were Seattle Sounders FC guys (MLS team) lifting there, so yea - I've been in the gym with serious athletes. And at my other gym, I lift with some world record holding powerlifters, so I've been around that side, too.
You're missing my point on Larry Allen - he is the STRONGEST the NFL has ever had, and his lifts, while certainly impressive, were not elite powerlifting level. And I understand that they don't train for that - I pointed out in my last post that maybe if Larry Allen focused on powerlifting training, he WOULD be the best, but he doesn't (although that 700lb bench was in an Inzer bench shirt, so he's certainly versed in that space)....but he doesn't. And the same applies to that deadlift. You're telling me a college kid can lift raw more than ANY powerlifter has in a suit, except for Ed Coan, who might be the best powerlifter of all time? I doubt that.
I'm not taking anything away from football players, I think they are the best all-around athletes out there...and while many of them COULD be elite powerlifters if they trained for it, they don't train for it. You've also gotta remember that a football gym lift is not necessarily a powerlifting-legal lift. That 160lb db that was squatting 550 - was he going past parallel? Was the bench press legal, or was there a bounce off the chest? Are these deadlifts smooth, without any hitching, to a full lockout?