RBs...
Gale Sayers, that injury prevented perhaps one of the greatest careers of all time from happening. He was great, but pre knee injury he was simply out of anyone's league.
Lawrence Phillips, a lot of pure talent gone to waste.
Joe Delaney, drowned saving 2 kids. Was well on his way to being KC's best back.
Bo Jackson, IMO the most talented RB there ever was. He had the perfect combination of power and speed.
Terrell Davis, could have been a HOFer with a couple more years.
Billy Sims, oh my gosh could he run the football. Would have loved for him to have a longer career.
QBs...
Archie Manning, it sucks that he played for the Saints in that era. A travesty.
Roger Staubach, gave 5 years to the Navy. I wonder what he could have done with those 5 years.
Don Majkowski, Brett Favre rendered him null and void. The Majek man was pretty fun to watch in his own right.
Bert Jones, it seemed like he was always dangerous and always hurt.
WR...
Sterling Sharpe, terrible announcer, great WR.
Michael Irvin, he had another 5 years in him easy minus that neck injury.
Daryl Stingley, he was so good. Tragic.
OL...
Eric Williams, was never the same after that car wreck.
Tony Mandarich, I got nothing.
DE...
Dexter Manley, I literally feared that guy on games we played them. Drugs derailed a potential all time great.
DT...
Jerome Brown, one of the best I ever saw.
Steve Emtman, unreal how fast he disappeared.
LB..
Quentin Coryatt, he'll always have that hit (you know which one) at A & M as his signature.
DB...
Ken Swilling, had he come out after his Jr. year, top 5 pick. A college injury plummeted him own the draft and he never recovered.
Chuck Cecil, the guy could lay the lumber on anyone. Fiercest hitter who never had a big name for it...ever.