The Patriots’ biggest receiving threat has a new Injury on Thursday’s report.

Thursday’s Injury Report for both the Detroit Lions and New England Patriots remained mostly the same from Wednesday’s. The key players going through concussion protocol—Darius Slay for the Lions, Trey Flower and Patrick Chung for the Patriots—remained out of practice. Everyone else that was Limited remained limited.

However, both teams added an extra player to their injury report on Thursday. Eli Harold, who the Lions traded for two weeks ago, popped up on the injury report with a hip issue. Last week, Harold picked up his first sack of the season against his former team, but he has only been a rotational player through two weeks, playing in just 34 defensive snaps total thus far.

The Patriots, however, added a much more significant injury to their report. All Pro tight end Rob Gronkowski was limited in Thursday’s practice with an ankle injury. Gronk has had an injury-filled career. In his past two years, he has missed 10 total games, and hasn’t played in a full 16-game season since 2011.

The Lions have notoriously had issues covering tight ends, so if Gronkowski can’t go on Sunday, it would be a big deal for Detroit’s defense. The Patriots’ backup tight end Dwayne Allen had 10 catches for New England last year in 16 game appearances (eight starts), and has only gone of 70 yards receiving in a game twice in his seven-year career.

Here is the full injury report for Thursday.

Lions injury report:

CB Darius Slay (concussion) - No practice
OT Andrew Donnal (knee) - No practice
LB Eli Harold (hip) - Limited practice
DE Ezekiel Ansah (shoulder) - Limited practice
G T.J. Lang (back) - Limited practice
CB Jamal Agnew (shoulder) - Limited practice

Patriots injury report

DE Trey Flowers (concussion) - No practice
S Patrick Chung (concussion) - No practice
T Marcus Cannon (calf) - Limited practice
CB Keion Crossen (hamstring) - Limited practice
S Nate Ebner (hip) - Limited practice
WR Josh Gordon (hamstring) - Limited practice
CB Eric Rowe (groin) - Limited practice
TE Rob Gronkowski (ankle) - Limited practice
RB Sony Michel (knee) - Full practice
DE Deatrich Wise (finger) - Full practice