The Colts on Tuesday announced the signing of RB Ty'Son Williams. The former Ravens RB failed to take over the top backfield spot when given the opportunity early last season in Baltimore, winding up 5th on the team in carries. With the Colts, Williams figures to compete with Phillip Lindsay for a spot on the game-day roster -- barring further additions at the position. The 2 look like similar special-teams prospects. That could be a key area to determining who sticks on the roster.