Morrison (quadriceps) has been ruled out for Thursday's game against the Cowboys, Scott Smith of the Buccaneers' official site reports.
Morrison will end up missing two consecutive games due to a quadriceps injury that he sustained during Week 4 prep, and his next chance to play is Week 6 against the Steelers on Sunday, Oct. 18. In Morrison's absence, the Buccaneers will lean more heavily on Zyon McCollum, Jacob Parrish and Keionte Scott in the secondary.