Broncos backfield was crowded before Theo Riddick. How does he fit in?

ENGLEWOOD, Colo. -- The Denver Broncos were already crowded at running back.

They already had three players in Phillip Lindsay, Royce Freeman and Devontae Booker who had each taken plenty of snaps with the starters during training camp, and coach Vic Fangio had said each could be used at any time, in any situation.

They were already a headache for fantasy football aficionados. And then the Broncos added Theo Riddick.

Suddenly it's Riddick who has played more NFL games (84), has more career carries (288) and more receptions than any back on the Broncos' roster. Riddick, who played a handful of plays in the preseason loss in Seattle Thursday night, is the only Broncos player who has caught at…