Torn ACL confirmed for Pittsburgh Steelers' Bud Dupree, source says

What Dupree's ACL tear could mean long term (0:47)

Adam Schefter reports the effect that Bud Dupree's injury could have on the Steelers' postseason chances. (0:47)

Tests on Bud Dupree's knee have confirmed a torn ACL, ending the Pittsburgh Steelers outside linebacker's season, a source confirmed to ESPN.

Asked about Dupree's injury Thursday, coach Mike Tomlin said: "You can characterize it as official that Bud is out for the year with a significant knee injury."

Dupree appeared to injure his knee on a noncontact play in the second half of Wednesday's 19-14 victory over the Baltimore Ravens. The Steelers have not specified which knee was injured.

Playing on the one-year franchise tag, Dupree will be a free agent after this season. He followed up his breakout 2019 campaign with another strong effort this season, recording eight sacks, two forced fumbles and 26 tackles. Along with T.J. Watt, Dupree was a foundational member of the Steelers' pass rush.

Steelers tight end Eric Ebron tweeted well-wishes to Dupree on Thursday, writing that he was "heavy hearted, but I know u will attack rehab/treatment and be back 100x better."

Replacing Dupree won't be easy. Rookie Alex Highsmith, the Steelers' third-round draft pick, is the top candidate to fill his role.

Dupree is the second Steelers defensive starter to go down with such an injury. Middle linebacker Devin Bush tore his ACL against the Cleveland Browns in Week 6.

News of Dupree's test results was first reported by NFL Network.