The Chargers were extremely selective in free agency and the 2026 NFL Draft in adding to their defense, which ranked ninth in the league last year while surrendering 20 points per game. The Chargers brought edge rusher Khalil Mack back on a one-year deal. Getty Images The biggest moves were bringing back edge rusher Khalil Mack on a one-year deal, signing veteran nose tackle Dalvin Tomlinson and selecting defensive end Akheem Mesidor in the first round. Here is a look at where things stand with their defensive depth chart, post free agency and the draft: Defensive line Starters:  Edge Khalil Mack, Edge Tuli Tuipulotu, DE Jamaree Caldwell, NT Dalvin Tomlinson, DT Teair Tart Reserves:   Akheem Mesidor , Bud Dupree, Kyle Kennard, Garmon Randolph, Nadame Tucker, Niles King, TeRah Edwards, Josh Fuga, Jahmeer Carter, Jacobian Guillory, Terry Webb, Justin Eboigbe, Nick Barrett The skinny:  Mack and Tuipulotu remain a solid one-two punch off the edge, with Mesidor, their rookie first-round pick,…