By Andrew Gould Colin Cowherd is never afraid to conceal his USC fandom. This time, he gleefully taunted the Oklahoma Sooners in the process. On Tuesday afternoon, the FOX Sports radio host talked smack to Lincoln Riley’s old program on the Trojans’ behalf. “Feel bad for @OU_Football,” Cowherd wrote. “USC gonna need about 18 months and they’ll be flying past em, around em, over em. This recruiting class will be other worldly. Best offensive HC in college w these weapons. Can’t quit smiling.” Cowherd clearly expects big things in Southern California with Riley as head coach. Last month, he clai…