In American football, the "Mike" refers to the middle linebacker on the defense. The quarterback or center may call out the "Mike" to help with the blocking schemes. This identification is crucial for the offense to establish the blocking points and determine who is assigned to block whom based on the location of the declared "Mike" linebacker. The "Mike" linebacker is responsible for calling the plays and is often the key player in setting up run and pass blocking schemes. The identification of the "Mike" linebacker allows the offense to orient and determine their blocking assignments based on the defensive formation. The term "Mike" is not a reference to a persons name, but rather a positional designation on the field.