The two veteran players contracts automatically voided at the start of the offseason.
Via the CO through BR:
According to Joseph Person of the Charlotte Observer, wide receiver Jerricho Cotchery and safety Roman Harper "had their contracts automatically void Thursday in contractual moves that officially began the offseason following the most successful season in franchise history."
Person noted the two players "will become unrestricted free agents in March, although it's unclear whether they will continue playing." Person pointed out Cotchery recently declared "he would play if he’s back with the Panthers," while Harper "has not discussed his future publicly.