Cornerback Derek Cox is not expected to return to the San Diego Chargers next season according to Michael Gehlken of the San Diego Union-Tribune. Cox was perhaps the worst free agent signing in the league in 2013. He landed a four-year, $20 million from the Chargers and proceeded to grade out as one of the league's worst corners while getting benched in favor of street pickups like Crezdon Butler repeatedly. Source: The Redzone