By Ian Casselberry Matt Entz is leaving North Dakota State after five years as the Bison’s head coach and 10 seasons in Fargo. Entz is joining Lincoln Riley’s staff at USC, he told ESPN’s Pete Thamel. Football Scoop’s Zach Barnett later reported that Entz will be the Trojans’ assistant head coach for defense and linebackers coach. He has never previously coached at the FBS level. During his five years leading the Bison, Entz compiled a 60–10 record (32–7 in the Missouri Valley Conference) and won two NCAA FCS championships in three title game appearances. Following five seasons as Chris Kliema…