OWINGS MILLS, Md. -- Baltimore Ravens LB Teddye Buchanan tore his ACL and will miss the remainder of the year, coach John Harbaugh said.
Buchanan also has a torn meniscus and a sprained LCL, a source told ESPN's Adam Schefter.
The hope is for Buchanan, the team's second-leading tackler, to be back by training camp.
Buchanan tore his ACL in Sunday's 24-0 win at the Cincinnati Bengals.
"He did a great job," Harbaugh said. "Nobody is into it more than he is."
A rookie fourth-round pick, Buchanan injured his right knee on punt coverage in the first quarter and was carted off to the locker room. He left the stadium using a cane.
Buchanan is the second defensive starter that Baltimore would lose for the season. Pro Bowl defensive tackle Nnamdi Madubuike suffered a season-ending neck injury in Week 2.
This would abruptly end Buchanan's highly productive first season. He had been one of the biggest surprises on the Ravens this season, making 11 starts after replacing Trenton Simpson at weakside linebacker. With Buchanan injured, Simpson is expected to regain his starting job.
Buchanan, 23, entered Sunday's game with 83 tackles, which trailed only middle linebacker Roquan Smith (100 tackles). He also added five tackles for a loss, two quarterback hits and a half sack this season.
"It sucks anytime you see your guy go down, somebody you go to war with every day and truly just a good dude," Smith said after the game. "It's giving me chills thinking about it, and just knowing what [Teddye Buchanan] stands for, knowing all that he's gone through. Obviously, it's an unforgiving business, and we know that. We signed up for that, and it just sucks, but I know it's a minor setback for him."
