Brilliant
Quoth Sir Alex, "Be a lad and fetch my roster and a pint of gin."
I'm just helping gizzmo and potentially other non-native speakers, since roster is an OED word and appropriate, if not common, in the context. (You were right that I didn't easily find an instance of it on BBC and can't clearly recall which commentators /leagues might use it)
Roster has the "descriptive list" quality distinguishing it; a roster will demonstrate who is fit and eligible, conditions, and positions of play. "Squad" is being described and can't be substituted in this usage.