FOXBORO -- The Patriots made a late change to their injury report on Thursday night when they announced that Rob Gronkowski had a back injury added to the list.  

The All-Pro tight end was previously listed as having only a knee injury, and he is now listed as having both knee and back issues. He did not participate in Thursday's practice.

Gronkowski was present and accounted for during Wednesday's session, and he was listed as a limited participant due to a knee ailment. 

ESPN has reported that Gronkowski received treatment for his injured knee, including an injection, at a Boston-area hospital during the day on Thursday. NFL Media reported that Gronkowski did not receive any knee injections but has been getting treatment on his knee in preparation for Saturday's Divisional Round game against the Chiefs. 

Gronkowski has a history of back issues dating back to his time at the University of Arizona. He missed his entire junior season in 2009 due to a back injury, and he reportedly underwent back surgery before the 2013 season.

The 6-foot-6, 260-pounder suffered a bone bruise/knee sprain in Week 12 against the Broncos and missed the following Patriots game -- a loss to the Eagles. He returned in Week 14 and played in each of his team's last four games.

Gronkowski was not spotted at Patriots practice on Tuesday, but the Patriots were not required to submit an injury report that day so there was no official word on his health following the session.