Harris was handed a three-game suspension for violating the NFL's policy and program for substances of abuse, and he's opted to appeal the ban, Ian Rapoport of NFL Network reports.
Harris was able to play Thursday against the Bills due to the appeal, catching one of five targets for nine yards and returning four kickoffs for 61 yards and one punt for 12 yards. The 23-year-old will remain eligible to play until a decision is made on his appeal.