Arizona's Ka'Deem Carey (25) isn't happy with the call and talks it over with the head linesman, Edwin Walker, right, during the first half of an NCAA college football game against Southern California at Arizona Stadium in Tucson, Ariz., Saturday, Oct. 27, 2012. (AP Photo/John Miller)

Associated Press
Arizona's Ka'Deem Carey (25) isn't happy with the call and talks it over with the head linesman, Edwin Walker, right, during the first half of an NCAA college football game against Southern California at Arizona Stadium in Tucson, Ariz., Saturday, Oct. 27, 2012. (AP Photo/John Miller)
Arizona's Ka'Deem Carey (25) isn't happy with the call and talks it over with the head linesman, Edwin Walker, right, during the first half of an NCAA college football game against Southern California at Arizona Stadium in Tucson, Ariz., Saturday, Oct. 27, 2012. (AP Photo/John Miller)
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