The Buccaneers placed McMillan (knee) on injured reserve Wednesday.
The move to IR officially rules McMillan out for the Buccaneers' next four games, but the wideout is projected to miss around 6-to-8 weeks after he sustained a PCL sprain of his left knee during Sunday's loss to the Vikings. With McMillan sidelined, rookie third-round pick Ted Hurst should be locked in as the Buccaneers' No. 3 wideout behind Emeka Egbuka and Chris Godwin.