Oregon's depth behind star running back Royce Freeman took a hit over the weekend, as the Ducks' No. 2 back, Thomas Tyner, had season-ending shoulder surgery.The procedure was done to Trayvon Mullen Jersey correct lingering pain from a shoulder injury Tyner sustained last season in a game Deonte Harty Jersey against Washington, . Tyner's father, John, told the website that his son underwent succe sful surgery Friday. The junior is expected to make a full recovery and return for the 2016 season, his father said.Oregon coach Mark Helfrich is likely to be asked why Tyner's need for surgery wasn't determined when the offseason began, rather than just as Darrell Simpson Jersey it was ending. It's a question that could have a logical explanation, but with some of Oregon's other skill players on offense coming off of injuries, the significance of Tyner's lo s isn't to be discounted. As Freeman's primary backup last season, Tyner rushed for 573 yards and five touchdowns, and the CSNNW story suggests his lo s could compel the Ducks' coaching Arthur Maulet Jersey staff to move Byron Marshall from wide receiver back to running back. Marshall played running back in 2013 but played more receiver last year and caught 74 pa ses.Oregon opens fall camp Monday.UPDATE: Helfrich on Monday confirmed that in fall camp. Oregon Mike Davis Jersey does not announce injuries as a policy.*Follow Chase Goodbread on Twitter *.