Oct 29, 2012; Glendale, AZ, USA; San Francisco 49ers running back (32) Kendall Hunter loses his helmet as he is tackled by Arizona Cardinals linebacker (58) Daryl Washington , defensive tackle (90) Darnell Dockett and linebacker (54) Quentin Groves in the fourth quarter at University of Phoenix Stadium. The 49ers defeated the Cardinals 24-3.; Mandatory Credit: Mark J. Rebilas