COSTA MESA After holding a walk-through on Thursday, the Chargers returned to the field for a standard day of practice on Friday.Wide receiver Keenan Allen (hamstring) went through individual drills during the beginning of practice. About halfway through individuals, Luis Valbuena Jersey he moved off to the side, working with trainers where he rans sprints Chris Young Jersey at about three-quarters speed.Kicker Dustin Hopkins (quad) was considered a limited participant for the second consecutive day.Right tackle Trey Pipkins (knee) is wearing a brace, but did partake in practice to some capacity after just working off to the side to start the week. Pipkins is dealing with an MCL sprain, but isnt expected to mi s any time.Limited: WR Keenan Allen (hamstring)K Dustin Hopkins (quad)T Trey Pipkins (knee) Full:QB Justin Herbert (ribs)G Zion Johnson Kole Calhoun Jersey (ankle)WR Joshua Palmer (ankle/knee)LB Kyle Van Noy (back)Did not participate:Scroll to ContinueILB Josey Jewell (knee)G Dalton Risner (back)Limited:OLB Jonathan Cooper (hamstring)RB Melvin Gordon (neck/ribs)CB Damarri Mathis (knee)G/C Quinn Meinerz (hamstring)TE Eric Saubert (thigh)S Caden Sterns Blank Jersey (hip)OL Billy Turner (knee)CB K'Wuan Williams (wrist)Full:RB Mike Boone (foot)CB Blake Parker Jersey Darius Phillips (hamstring)DL Mike Purcell (ankle)OLB Baron Browning (wrist)S P.J. Locke (concu sion)OLB Aaron Patrick (concu sion)RB Latavius Murray (wrist)QB Ru sell Wilson (shoulder)