Kelly was an off-season acquisition, expected to bolster the middle of the Patriots defensive line alongside nose tackle Vince Wilfork. After Kelly tweaked his knee late in week 5 against the Bengals, he returned to practice in Week 9 to face the Steelers. Unfortunately, he suffered a setback on Thursday and was held out of practice on Friday.
Through five games, Kelly notched 22 tackles, 2.5 sacks, and recovered a fumble. His size and presence will surely be missed. While rookie Chris Jones has certainly stepped up his performance, the depth at defensive tackle leaves a lot to be desired and you can be certain the Patriots will try and find an additional veteran body to add to the position, alongside the newly acquired Isaac Sopoaga.