Well, these are press shots of some on set filming of Glee. Not sure if for an episode, having Rachel prove a point, and play on the team at McKinley or something else. Easily, this could just be a Superbowl spot or for the Superbowl episode, not sure yet.
Lea did say a football themed episode was airing after the Superbowl and she told Entertainment Tonight “It’s a lot of football stuff. You may or may not see me in a football uniform. That I will say”
[...] Overstreet and others were again spotted in football gear on location filming. We know we’ve seen them filming Superbowl scenes early last month in uniform as [...]