<P> In the East, Ernest Cozens of Penn was "one of the first of the roving centers," another, archaic term for the position, supposedly coined by Hank Ketcham of Yale . Walter E. Bachman of Lafayette was said to be "the developer of the "roving center" concept ." Edgar Garbisch of Army was credited with developing the "roving center method" of playing defensive football in 1921 . </P> <P> In professional football, Cal Hubbard is credited with pioneering the linebacker position . He starred as a tackle and end, playing off the line in a style similar to that of a modern linebacker . </P> <P> The middle or inside linebacker (MLB or ILB), sometimes called the "Mike" or "Mack", is often referred to as the "quarterback of the defense ." Often it is the middle linebacker who receives the defensive play calls from the sideline and relays that play to the rest of the team, and in the NFL he is usually the defensive player with the electronic sideline communicator . A jack - of - all - trades, the middle linebacker can be asked to blitz (though they often blitz less than the outside linebacker), cover, spy the quarterback, or even have a deep middle - of - the - field responsibility in the Tampa 2 defense . In standard defenses, middle linebackers commonly lead the team in tackles . The terms middle and inside linebacker are often used interchangeably; they are also used to distinguish between a single middle linebacker playing in a 4--3 defense, and two inside linebackers playing in a 3--4 defense . In a 3--4 defense, the larger, more run - stopping - oriented linebacker is usually still called "Mike", while the smaller, more pass protection / route coverage - oriented player is called "Will". "Mikes" usually line up towards the strong side or on the side the offense is more likely to run on (based on personnel matchups) while "Wills" may line up on the other side or even a little farther back between the defensive line and the secondary . </P> <P> The outside linebacker (OLB), sometimes called the "Buck, Sam, and Rebel" is usually responsible for outside containment . This includes the strongside and weakside designations below . They are also responsible for blitzing the quarterback . </P>

Where did the term mike linebacker come from
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