Barkevious Mingo's return to the field for the Cleveland Browns remains a mystery.

The rookie outside linebacker is nursing a bruised lung he suffered during last Thursday's 24-6 preseason win over the Detroit Lions. Browns coach Rob Chudzinski admitted Tuesday he isn't sure when Mingo will be back.

"Basically the bottom line with KeKe is nobody really knows" Chudzinski told reporters per The Plain Dealer. "It's just how his body is going to heal."

A source told Cabot that the Browns expect Mingo to return to practice in a week or two but Chudzinski offered no timeline saying: "We're just waiting. Everybody's body heals differently and at a different rate."