Kliff Kingsbury is Clay Helton's most important hire at USC Posted Dec 5, 2018 New USC offensive coordinator Kliff Kingsbury is the most important hire Clay Helton will ever make. That is not because of Kingsbury, specifically, but of what he will represent to Helton's USC career: a possible savior. Helton got his mulligan. He won't get another chance to retool his staff if the Trojans don't show major improvement from this year's 5-7 team. It either works with this new staff or it's over. (ESPN.com)