USC head coach Steve Sarkisian is taking an indefinite leave of absence, athletic director .Haden announced the decision after Sarkisian didn't attend practice."It is very clear to me that he is not healthy," .Offensive coordinator Shane Greene Jersey /quarterbacks coach Clay Helton will serve as the interim head coach while Sarkisian seeks treatment. While it Matthew Boyd Jersey remains unclear exactly what transpired to prompt Haden's move, indicating that Sarkisian showed up Sunday in no condition to work.Sarkisian participated in an unspecified treatment program prior to the start of the 2015 season following during which he was . USC -- then ranked No. 17 in the AP Top 25 -- was upset by Lance Parrish Jersey Washington, 17-12, at the Los Angeles Coliseum in front of a national-television audience on Thursday night. It was Washington's first win at the Coliseum since 2010. The defeat -- USC's second consecutive home lo s -- e sentially knocked the talent-stacked Trojans out of the national title picture. It doesn't get any easier for USC, either, as a trip to South Bend, Ind., to take on awaits on Saturday."I feel bad about it," Dixon Machado Jersey following the lo s to Washington. "I'm hurt about it. My job is to try to figure that out, to get the best out Victor Martinez Jersey of our players every time we take the field."Helton is in his second stint as USC's interim coach. He led the Trojans to a Las Vegas Bowl victory in 2013.Follow College Football 24/7 on Twitter __.