If they win, the wide receiver who had three catches this season would be eligible for a championship ring.
Underwood tweeted that he would use his release as motivation, thanked his supporters and wished the Patriots luck. The team filled his roster spot for Sunday's game against the New York Giants with defensive end Alex Silvestro. Both played college ball for Rutgers.
Underwood tweeted: "Im Fine, This Will Only Make Me Stronger...Tough Times Never Last But Tough Ppl Do."