tight

The tight end (TE) is an offensive position in American football, arena football, and Canadian football. It is a hybrid that combines the characteristics and roles of both an offensive lineman and a receiver. As part of the receiver corps, they play inside the flanks (tight), contrasted with the split end who plays outside the flanks (wide). Like offensive linemen, they are usually lined up on the offensive line and are large enough to be effective blockers. On the other hand, unlike offensive linemen, they are eligible receivers and potent weapons in a team's offensive schemes. A good tight end is designed to be a mismatch in one of two ways- due to their larger size to a regular receiver an opposing team may allocate a defensive lineman to block a tight end for run plays, but that lineman would be unable to keep up with a tight end on a passing play. Conversely, an opposing team may allocate a smaller and faster safety or cornerback to guard a tight end in case of a pass play, but then that safety will be in danger of being overpowered by the tight end in a run play.
The tight end's role in any given offense depends on the preferences and philosophy of the head coach, offensive coordinator, and overall team dynamic. In some systems, the tight end will merely act as a sixth offensive lineman, rarely going out for passes. Other systems use the tight end primarily as a receiver, frequently taking advantage of the tight end's size to create mismatches in the defensive secondary. Many coaches will often have one tight end who specializes in blocking on running plays while using a tight end with better pass-catching skills in passing situations.
Offensive formations may have as few as zero or as many as three tight ends at one time.

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