(ALLEN PARK, MI) – Detroit Lions running back D'Andre Swift has been ruled out of Sunday's game against the Carolina Panthers after suffering a concussion. Running backs coach Kyle Caskey made the announcement Friday. Swift practiced Wednesday in full and then spoke with the media following practice. He was not at practice Thursday and later in the day was listed with a concussion. On Friday morning, before Swift had been ruled out, Lions coach Matt Patricia said it would be "difficult" for Swift to clear protocol in time to play against the Panthers. Patricia and Caskey both declined to say how or when the concussion happened. Patricia says it's just something that came up and they wanted to make sure that they were doing their due diligence there, making sure that Swift was OK. Swift was coming off his first career start against Washington, rushing for 81 yards on 16 carries and catching five passes for 68 yards and a touchdown. The Lions had been giving him more work each week to get him ready to take over the starting role. It had been a process, in part, because of the lack of preseason games and spring workouts combined with time Swift missed during training camp due to an injury. In Swift's place, the Lions will use a combination of Peterson and Kerryon Johnson, who was last year's starter. The Lions have also ruled out wide receiver Kenny Golladay (hip) and Danny Amendola (hip). In better news for Detroit, receiver Marvin Jones (knee) and tight end T.J. Hockenson (toe) practiced Friday and are good to go, giving the Lions at least part of their core offensive group for sure.