Tackle-eligible Play

In football, the tackle-eligible play is a forward-pass play in which coaches will attempt to create mismatches against a defense by inserting an offensive tackle (who is not normally allowed more than five yards down field on a forward-pass play), into an offensive formation as an eligible receiver, usually as a tight end or as a fullback. This is done by changing the formation of the offensive line, via positioning two linemen (including the "catching tackle") on one side of the center and four linemen on the other. This is normally only run inside the five-yard line.

Under almost all versions of gridiron football, offensive linemen cannot receive or touch forward passes, nor can they advance downfield in passing situations. To identify which receivers are eligible and which are not, football rules stipulate that ineligible receivers must wear a number between 50 and 79. This, however, can be circumvented in most leagues, most commonly by informing the referee of any player with a number in the ineligible range who lines up as an eligible receiver.