Browns rookie outside linebacker Barkevious Mingo is unlikely to play in the regular-season opener Sept. 8 against the Miami Dolphins, but he’s probable for Week 2 Sept. 15 against the Baltimore Ravens, ESPN’s Adam Schefter reported today.

Mingo is scheduled to undergo a CT scan Monday, ESPN's Ed Werder reported today. The test should help the Browns decide Mingo's status for Week 1.

Mingo, the sixth overall pick in this year’s draft, hasn’t practiced or played since the first quarter of the Browns’ preseason win over the Detroit Lions Aug. 15 and was subsequently diagnosed with a bruised lung. Browns coach Rob Chudzinski has repeatedly told reporters that no timeline has been established for Mingo's return.

Mingo has been working out on a stationary bike since last week. He did some running Tuesday and went through a weight-room workout Wednesday, a team spokesman said.

Medical personnel began examining Mingo on the sideline against the Lions because he said he was spitting up blood and experiencing shortness of breath. Mingo was taken to the Cleveland Clinic’s main campus before the game ended and spent two nights in the hospital.

Mingo insisted he did not suffer any broken ribs. Mingo said he believes his lung was bruised during the opening kickoff against the Lions, but neither he nor the Browns have been able to definitively identify one big hit as the culprit.

Still, Chudzinski said Sunday that the diagnosis for Mingo is still a bruised lung.

Chudzinski was asked Tuesday whether the regular-season opener is a realistic target date for Mingo’s return.

“We have no timetable,” Chudzinski said. “We just have to see how he progresses and how he heals. It’s really just an individual thing. It’s from individual to individual on how quickly they heal.”