So I'm a linebacker. Have you ever been one?
No I'm a girl so we dont typically play football but I do love watching and my husband was a Middle Linebacker in college!
Neat! A linebacker is a position in American and Canadian football. Lots of teams have one (and it can be pretty rough)
Are they an offensive or defensive position? 
Linebackers are members of the defensive team three to five yards behind the scrimmage line!
How many linebackers are typically on the field at one time?
as the most important position in defense, due to their versatility in providing hard hits on running plays or an additional layer of pass protection, when required. Similar to the "free safety" position, linebackers are required to use their judgment on every snap, to determine their role during that particular play.
History.
Before the advent of the two-platoon system with separate units for offense and defense, the player who was the team's center on offense was often, though not always, the team's
practice I'm playing fullback and, when I go out for a pass, this little linebacker named Dennis Morgan who had forearms like Popeye just about ripped my head off. Right then and there I said 'I want to be that guy, not this guy.' I had no problem switching to linebacker.
University of Michigan 1968 season.
As a sophomore, Huff made his college football debut with the 1968 Michigan football team. In his first game for Michigan, a 31-10 victory over Duke in September