The Chargers added S Pat Watkins and released WR Gary Banks to make room on the roster. The release of Gary Banks is not surprising since Malcom Floyd and Legedu Naanee are getting healthy and Vincent Jackson is just one week away from being activated.
My recollections of Pat Watkins mainly consist of him being the weak link in the Cowboys secondary when he used to start a few years ago. Since then he's been almost exclusively a backup. It's probably safe to assume that he's joining the team to play special teams. It's also possible that this says something about the severity of the injury to Steve Gregory, but that's just speculation.
Pat Watkins will wear #26.