​Lions linebacker Jack Campbell will be hospitalized overnight after suffering what appeared to be a serious injury on Sunday against the Vikings.The Lions released a statement three hours after today’s game in Detroit ended to say that Campbell is being evaluated.”Jack Campbell is resting and will remain in a local hospital tonight, for continued evaluation and monitoring. The team will provide further updates as we have them,” the statement said.Campbell was motionless on the field for several minutes after a collision, and players on both teams were visibly shaken by the injury. The Lions have said Campbell is alert and breathing but have not offered any clarification about whether Campbell has movement in his extremities.