The Jets waived Knight on Monday, Ethan Greenberg of the team's official site reports.
Knight signed with the Jets in May as an undrafted free agent out of NC State, where he rushed 140 times for 753 yards and three scores during his final collegiate campaign. He impressed during training camp and rushed 15 times for 53 yards across three preseason contests. Knight initially made the team's 53-man roster, but he's been waived to make room for the Jets to re-sign veteran offensive lineman Conor McDermott.