Before the new league year begins in March, the current backfield for the Chargers is made up of Melvin Gordon, Austin Ekeler, Justin Jackson, and Troymaine Pope. Pope of course is more of a reserve back behind the main three, but he has been used in special teams and during the Miami game when the Chargers didn’t have Gordon or Jackson.
Three out of the four running backs enter some form of free agency. Gordon is an unrestricted free agent, Ekeler is restricted, and Pope has exclusive rights free agency, since he’s accrued fewer than three seasons.