NFL Network's Adam Schefter reports the Raiders have released WR Doug Gabriel. Gabriel was in line to make $1.7 million in base salary this season, far too much for a fourth receiver at best. Mike Williams, Travis Taylor, and Johnnie Lee Higgins slide up the depth chart. Williams seems like a strong bet to see plenty of playing time when Oakland is in the red zone. Gabriel should get picked up, but has proven he isn't starting material.