Just five days from opening against Eastern Washington, Oregon State football coach Mike Riley made a big revelation.
Last season, he vacillated between quarterbacks Sean Mannion and Cody Vaz. This year, the same.
On Monday, Riley announced Mannion would be the starter against the pesky Eagles.
The long-tenured, soft-speaking Riley is not alone in the Pacific-12 Conference with a fluctuating quarterback situation.
At Arizona, Rich Rodriguez used Matt Scott in 2012 to run his up-tempo spread offense. Scott flourished in…