How Tre Boston impacts Chargers' 2017 depth chart Posted May 14, 2017 Safety Tre Boston did indeed bolt to Los Angeles to sign with the Chargers despite visits with the Buffalo Bills and Pittsburgh Steelers. The signing of Boston addresses an area of need for L.A. as they continue to make offseason moves. Look to Boston to have an immediate impact roving as a deep safety as well as coming up in the box against the run. (USA Today)