EE hooking bag strap to arms on Bagger 150. Walked across platform rolls to hook other bag strap-slipped-grabbed bag for support injured left wrist. Did not seek medical attention on 8/16/11. On 11/21/11 sought medical attention was given restrictions - NYCO able to accommodate. On 1/19/12 EE placed out of work - NYCO no longer able to accommodate restrictions.