Baltimore Ravens quarterback Lamar Jackson needs thumb surgery and will be placed on injured reserve, according to ESPN’s Adam Schefter. With going on IR, Jackson will miss at least the next four games.

Jackson suffered the injury on the first offensive play in Sunday’s 36-10 loss to the Buffalo Bills. Jackson immediately went to the locker room and did not return.

Ravens head coach Jesse Minter said after the game that Jackson’s thumb injury is potentially season-ending.

Tyler Huntley replaced Jackson under center. He also left the game with a toe injury in the second quarter and did not return.

Emergency third-string quarterback Joe Fagnano replaced Huntley. Fagnano is an undrafted free agent out of UConn. It was his first career regular-season appearance.

Prior to Sunday, Jackson missed the last three games with an ankle injury. Baltimore went 1-2 during those three weeks, losing their last two.

Baltimore is currently in last place in the AFC North at 4-4.

The Steelers’ first meeting against Baltimore is in Week 15 at Acrisure Stadium. The second game in Baltimore is in Week 18.

The Steelers enter their bye week in first place in the AFC North at 6-2.