Keene (knee) was a limited participant during Thursday's practice, Zack Cox of NESN.com reports.
Keene sat out last week's loss to the Bills with the knee issue, and he appears to still be battling the knee issue. The Patriots' tight end depth chart is currently pretty banged up, with Keene and Ryan Izzo (hamstring) battling injuries, along with Devin Asiasi (undisclosed) hitting injured reserve Tuesday.