Traditionally a purely blocking position, several eventual hall of famers changed the position to make it more dynamic and part of the passing game. In the 1970’s, while on the staff at Detroit, Bill Belichick explored two tight end sets, creating major problems for defenses. Today, while some teams might keep a purely blocking tight end that would also contribute on special teams, most teams have at least one, and often two pass catching tight ends. The value is the mismatch against a smaller corner or slower tight end. When an offense can utilize that, along with speedy slot receivers, it becomes a matchup nightmare for defenses. A tight end that can line up outside, in the slot, close to the line, and sometimes as an H-back, is often called a “move” tight end.