The Raiders acquired Schaub in a March 2014 trade with the Houston Texans. Last year, he lost a preseason battle for the starting job to rookie Derek Carr and did not see his first game action until Oct. 26.
Schaub attempted 10 passes last season, completing five for 57 yards and throwing two interceptions.
Before coming to Oakland, the 33-year-old spent seven years with the Houston Texans, starting 88 games. His best year came in 2009, when he completed 67.9% of his passes for an NFL-leading 4,770 yards, 29 touchdowns and 15 interceptions.
- Molly Geary