UMass transfer forward Josh Cohen has flipped his commitment from Arkansas to USC, he told On3. The 6-foot-10 senior will be following Eric Musselman, who was named head coach of the Trojans on Thursday. Cohen averaged 15.9 points and 6.8 rebounds per game this season for the Minutemen. The Lincroft, New Jersey native is currently ranked as the No. 42 overall player in On3’s Transfer Portal Rankings. Josh Cohen flips commitment from Arkansas to USC, transfer portal background informationThe NCAA Transfer Portal, which covers every NCAA sport at the Division I, II and III levels, is a private d…