Sam, Mike and Will: Football Linebacker Roles Explained

Sam, Mike and Will are traditional linebacker names: Sam works toward the defense's declared strength, Mike plays the middle and Will works away from the strength. They provide a starting map, not a universal assignment sheet.

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The familiar picture is a front with four defensive linemen and three linebackers. Modern personnel groups can keep only two of those linebackers on the field, move one onto the line or use entirely different terminology.

Sam: toward the strength

In the classic alignment, Sam works toward the tight end side. He may need to meet that player as a blocker, cover him or control the outside run. A defense can declare strength by another cue, including receiver distribution or the wide side of the field.

That makes offensive motion a communication problem. The defense must decide whether Sam travels, teammates exchange responsibilities or the original call remains in place.

Mike: the middle

Mike often helps relay the call and organize the front. He fits interior runs, reads blockers and handles coverage or pressure assignments. A central alignment makes him a natural communicator, but the helmet radio can belong to another defender.

When the quarterback points and calls out a Mike, he may mean something different. The offense can designate a defender as its blocking count reference even if that player's defensive position is not middle linebacker.

Will: away from the strength

Will commonly pursues from the weak side, closes cutbacks and plays in space. Weak side does not mean easy or unimportant. Counter, split zone and boot action can all attack him if he follows the first movement too aggressively.

He must still defeat blocks, cover and tackle; speed alone does not solve the role.

What nickel changes

In a common nickel adjustment, a fifth defensive back replaces the traditional Sam and leaves two linebackers. That is one personnel choice, not a mandatory substitution. Teams choose the defenders who fit the situation and may rename the remaining jobs.

To follow the positions on television, identify the declared strength and central linebacker, then watch the actual responsibilities after the snap. A Sam rushing from the edge and a Sam covering a tight end can have very different jobs while sharing the same label.

Keep learning

• Nickel defense: See how five defensive backs change the front.

• Edge versus outside linebacker: Separate a rush role from a position name.

• The Star position: Explore a hybrid that can inherit some linebacker responsibilities.

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Reference: NFL Football Operations linebacker definitions.