Maryland linebacker Kenny Tate, in a photo taken before he injured his left knee. (Jonathan Newton/WASHINGTON POST)

Tate has been in and out of practice since training camp began on Aug. 6. At that time, Tate pronounced himself a “full go” after he had surgery on his right knee that limited him to four games last season.

Edsall did not disclose the specific nature of Tate’s most recent injury, which apparently occurred a little more than a week ago. Tate sat out the team’s open scrimmage on Saturday at Byrd Stadium.

“Just has some cartilage issues there,” said Edsall, who indicated the injury happened in non-contact drill. “It looks to be probably a three- to four-week situation is what the doctors have told me.”

News of Tate’s extended absence comes one day after potential starting defensive end Andre Monroe had season-ending knee surgery and on the same day starting quarterback C.J. Brown also had knee surgery that will keep him out until next season.

Other notable players who will miss the opener include safety Matt Robinson (sprained shoulder), safety A.J. Hendy (sprained ankle) and cornerback Isaac Goins (mononucleosis).

Defensive end Keith Bowers has an undisclosed injury and is expected to miss at least another two weeks.