FOXBORO — Patriots wide receiver Mack Hollins participated Thursday in his first practice since suffering an abdomen injury during the team’s win at Baltimore last month.

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Hollins remains on injured reserve, but his presence Thursday indicates the team has opened his 21-day window for activation. The Patriots could activate Hollins for Sunday’s AFC Championship Game, though they would first need to clear a roster spot.

Cornerback Carlton Davis (concussion) remained in a non-contact jersey for a second straight practice, indicating he is still in Phase Four of the NFL’s five-phase concussion protocol.

Outside linebacker Harold Landry, center Garrett Bradbury and linebacker Marte Mapu were missing at the start of practice. Landry did not practice Wednesday, while Bradbury and Mapu were newly absent.

Backup running back Terrell Jennings (concussion) and rookie defensive tackle Joshua Farmer (hamstring) continue to practice while on IR.

The Patriots will release their next injury report Thursday evening.