I think what Hoyt ended up doing in the movie is similar to the role of a Strong Safety in football.
From Wikipedia:
Strong safety
The strong safety, sometimes in college called a rover (ROV), tends to be somewhat larger and stronger than the free safety. However, the word strong is used because he is assigned to cover the "strong side" of the offense, the side on which the big, powerful tight end lines up on offensive plays. The strong safety tends to play closer to the line and assist in stopping the run. He may also be responsible for covering a player, such as a running back or fullback or H-back, who comes out of the backfield to receive a pass. A strong safety's duties are a hybrid of those belonging to a linebacker and those of the other defensive backs, in that he both covers the pass and stops the run. Three of the most notable strong safeties are Ken Houston, John Lynch and Rodney Harrison. Among the best active strong safeties are Troy Polamalu, Adrian Wilson and Eric Berry.
Hoyt was the last guy who could shut down Alonzo. Besides the Russians.