Carolina Panthers star running back Christian McCaffrey isn’t likely to return to action this weekend.The Panthers (3-1) on Friday listed McCaffrey as doubtful for Sunday’s game against the visiting Philadelphia Eagles (1-3).McCaffrey registered limited practices this week as he works his way back from a hamstring injury sustained during Carolina’s 24-9 victory over the Houston Texans on Sept. 23.”Nothing much more to add,” Panthers head coach Matt Rhule said. “He’s been going. It’s doubtful he’ll play on Sunday. That could change. I’m not going to play any games (with the injury status).”McCaffrey, 25, has 52 carries for 201 yards and a touchdown to go along with 16 receptions for 163 yards in three games this season. He played only three games in 2020 due to a high ankle sprain and a shoulder injury.Rookie running back Chuba Hubbard rushed for 57 yards and added two catches for 14 yards in the Panthers’ 36-28 setback to the Dallas Cowboys on Sunday.