BALTIMORE — The Pittsburgh Steelers lost one defensive lineman earlier this week. They lost two more during Sunday’s 28-24 win against the Baltimore Ravens.

Starters Tyson Alualu and Cameron Heyward left because of injury. Coach Mike Tomlin gave little detail on the status of either during his postgame remarks on video conference. Alualu suffered a knee injury during the first quarter and did not return. Heyward suffered an undisclosed injury on the third-to-last play.

Coupled with veteran Chris Wormley going on injured reserve Friday, the Steelers finished Sunday’s game with three defensive linemen: starter Stephon Tuitt, second-year player Isaiah Buggs and first-year player Henry Mondeaux.

Mondeaux entered the game with six career regular-season NFL defensive snaps since signing as an undrafted free agent in 2018. Buggs, a seventh-round pick of the Steelers last year, entered with 126 career defensive snaps and was inactive for the previous game.

Heyward went down twice during the fourth quarter Sunday. The first came at the end of a J.K. Dobbins run with 4 minutes, 18 seconds left. However, despite lying on the grass as the training staff attended to him, Heyward returned two snaps later.

Tomlin indicated it was his understanding that was a cramp, but Tomlin had no details about why Heyward was left lying in the wet grass after a Ravens’ fourth-down conversion with 26 seconds left.

“I don’t have the details,” Tomlin said. “I am sure I will have that for you next (media news conference).”

Tomlin was similarly light on the prognosis surounding Alualu’s injury: ““I don’t have the answer to that. I will next time we visit.”

Heyward was named All-Pro after two of the past three seasons and signed a four-year, $65 million contract extension before this season began.

Alualu, the No. 10 overall pick in 2010, has been a revelation in his fourth season with the Steelers. The departure of Javon Hargrave elevated Alualu to starter at nose tackle, and he had been playing like one of the best at that position in the league.

The only other defensive lineman on the Steelers 53-man roster is rookie seventh-round pick Carlos Davis. Rookie end Calvin Taylor is on the practice squad.

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