Chapman, 19 was on loan to the U's during the 2008/09 seasons campaign; making 20 appearances and scoring twice as the former Football League club finished in 7th placed in the BSP.
Adam Chapman celebrates his winning goal against Burton Albion (1-0).Image Copyright to SportBox.TV
It is believed that the Belfast born midfielder has left the Lane on a free transfer with a deal that could rise to £15,000 as well as a sell on clause. He leaves Bramall Lane having failed to make an appearance in the first team.