The spring transfer portal is open for business, and everyone around USC knows the Trojans don’t have the full roster they need to compete for a Big Ten championship and a spot in the College Football Playoff. Players have transferred out of the program, opening up roster spots with spring practice still going on. The USC football spring game is this coming Saturday, April 20. Lincoln Riley is preparing for that game, but in the meantime, he and his staff have to pounce on transfer portal opportunities. Which position is paramount for Riley and the Trojans? Riley did not evade...