Maryland quarterback C.J. Brown, shown this spring, will miss the season with a torn ACL. (Patrick Semansky/AP)

The injury occurred on Tuesday night during non-contact drills in the second of the day’s two practices. Maryland also practiced on Tuesday morning at Byrd Stadium in preparation for its season opener on Sept. 1 against William & Mary.

“I feel terrible for C.J.,” Edsall said in the statement. “He’s worked incredibly hard to be the starting quarterback of this team. He’s stepped up and been a tremendous leader. We’ll do everything we can to make sure he gets the best treatment to help his recovery.”

Brown started five games last season and appeared in 10 as Edsall changed starting quarterbacks three times during his first season in College Park. Danny O’Brien started the first five games before Brown started the next three. Edsall went back to O’Brien for back-to-back weeks before going to Brown for the last two games of the season after O’Brien suffered a broken bone in his arm against Notre Dame.

O’Brien, the 2010 ACC rookie of the year, transferred to Wisconsin with two seasons of eligibility left after Maryland completed the season 2-10. Brown, meantime, finished with 842 passing yards and seven touchdowns with six interceptions. He also had 574 rushing yards, the most in one season for a Terrapins quarterback, and five rushing touchdowns.

Brown was set to be the centerpiece of a revamped offense under first-year coordinator Mike Locksley, who is implementing a pro-style formation. Last season, the Terrapins used spread as its base offense.

“Although C.J. won’t be out on the field, he’ll continue to be an important part of this program,” Edsall said. “As a captain and team leader, he’ll do everything he can to help mentor other quarterbacks on our team.”

Maryland is left with a pair of non-redshirt freshmen behind Brown, who missed all but one game in 2010 with a shoulder injury.

Perry Hills presumably ascends to starting quarterback after Edsall said on Tuesday he was a ahead of Caleb Rowe in the competition for the backup job.