Wiktionary
utility player
n. 1 (context sports English) A player who can play more than one position. 2 (''fantasy sports'') A player who accumulates stats without being assigned to any particular position.
Wikipedia
Utility player
In sport, a utility player is one who can play several positions competently, a sort of jack of all trades. Sports in which the term is often used include football, baseball, rugby union, rugby league, water polo, softball and track.
The term has gained prominence in all sports due to its use in fantasy leagues, but in rugby and rugby league, it is commonly used by commentators to recognize a player's versatility.