What's a fb?
A fullback. Don't you ever watch football? Most are large, hard running, oafs. Offensive linemen have always been considered oaf's, but they're generally the smartest guys on the field, memorizing line checks, working as a unit, and knowing what the D-linemen and linebackers tendencies are every week. Lot's of future doctors and researchers, up there banging heads with a guy six inches away. Quarterback, wide receiver, running back, and defensive back is generally where the oaf's go. All the coach has to tells them is, "Go that way, son." Those are the positions you don't need much brain power to play. Failed fullbacks with a case of fumblitis are normally moved to linebacker/defensive end where their aggression, size, and speed are needed. That's where they learn running into a 300 lb. plus pulling guard or tackle with a full head of steam leading a sweep isn't wise.
Now what's this "Facebook" thing you guys speak of? Some sort of geeky video game? Al covers those and the "X-Games"