There are injuries, which are a natural part of football, and then there are injuries. The season-ending shoulder surgery to Oregon running back Thomas Tyner, as reported by Aaron Fentress of CSNNW.com, is an injury—emphasis definitely added.
As Fentress noted, Tyner originally sustained the shoulder injury last season against Washington. "Lingering pain and discomfort" led to the procedure, and per Tyner's father, the junior is expected to recover fully in time for the 2016 season.
Spoke with John Tyner, as well, who said what he's told @AaronJFentress: Thomas Tyner "likely" out for the year, left shoulder.