they take a knee when someone is hurt. The linemen work really hard for no reason other than to protect the quarterback and running back.
To protect their knees.
anything but defensive linemen
Offensive Linemen ... or Offensive Line OL - Offensive Line
google, nfl network
150000-700,000 a year
No, although swimming requires a lot of energy, so does football. It's a guy thing, so football players, like linemen, eat more than Phelps.