The Oakland Raiders have signed cornerback Chimdi Chekwa. Chekwa rejoins the Raiders following a brief stint with the New England Patriots this offseason after signing with New England as a free agent in March. He was released by the Patriots on Monday. Before signing in New England, Chekwa spent four seasons with the Raiders. Chekwa is a former Raiders fourth-round draft pick from Ohio State. The Raiders cut safety Terrell Pinson. Follow me on Twitter: @RavensInsider Aaron Wilson covers the Ravens for The Baltimore Sun