Steelers defensive end Derrick Harmon was carted to the training room early in the second quarter.
The Steelers list him as questionable to return with a foot injury.
It is unknown how or when Harmon was injured.
Harman has no stats on Thursday night, but he has 12 tackles, 1.5 sacks and a forced fumble this season.
The Steelers made him a first-round pick in 2025.
The Browns lost their 2025 first-round pick, Mason Graham, to a knee injury in the first quarter. Graham is also questionable to return.