Browns coach Mike Pettine confirmed Thursday linebacker Barkevious Mingo had a procedure on his knee and will miss an unspecified amount of time.

The injury happened on an isolated play in practice Tuesday. Pettine said he and the team feel for Mingo, who had just returned to 100 percent health after offseason shoulder surgery.

"Especially a guy that works that hard, that is that quality a character, an individual that it's important to him and he puts the time in," Pettine said. "Unfortunately you have some guys that get some unfortunate injuries but you root for guys like that to come back, and come back and play well."

Mingo, 24, played the entire 2014 season with a nagging shoulder injury and battled a bruised lung during his rookie year. The LSU product spent a large chunk of his 2015 offseason around the team facility rehabbing and putting in additional mental work.

With the timetable on Mingo's knee still unknown, Pettine said two other linebackers will be thrust into larger roles in coverage.

"What is really means is that (Paul) Kruger will take on some more of our SAM linebacker role along with (Nate) Orchard who we've been prepping to do that," Pettine said. "We might have to package some other things, using whether it's an additional safety or and additional inside linebacker. But still, we're a ways away from having to worry about that chart from a game standpoint."

In 30 career games through two seasons, Mingo has totaled 81 tackles and seven sacks.