Offensive linemen

Offensive linemen (also OL) are American football players who defend the quarterback or running backs by blocking defensive players.

 Details 
OL are separated from 4 positions.
Center (C) (1)
Guard (G) (2)
Tackle (T) (2)
Tight end (E) (0~2)

 Rules 
OL (without C) must not touch a ball.
Do not grab defensive players from behind.
In pass play, don't cross the line of scrimmage.
OL must wear uniform which the number is 50 to 79.

 References 
NFL web cite
Football Fanatics(Football shop)

Category:American football positions