The San Diego Chargers added fullback Billy Latsko to the active roster today, signing him from the team?s practice squad. To make room for Latsko on the 53-man roster, the Chargers placed defensive end Keith Grennan on ?Reserve-Injured? with a leg (fibula) injury. Latsko, 5-10, 233, is a first-year player out of the University of Florida. He will wear #34.