Washington Redskins rookie defensive end Jarvis Jenkins is expected to have surgery to repair his torn ACL sometime next week, according to his agent, Joe Flanagan.

Jenkins, drafted 41st overall out of Clemson last April, is in relatively good spirits, Flanagan said. Jenkins suffered the injury during the second defensive series of Washington’s preseason game at Baltimore on Thursday night.

Baltimore had the ball on its 42-yard line, and Jenkins was trying to get in on a play in which running back Ray Rice took a handoff and ran off the left guard.

Jenkins was examined by the team’s athletic trainers and then helped off the field. After the game, Jenkins was told his ACL “felt loose,” and Friday morning, the 6-foot-4, 325-pound Jenkins tweeted about the extent of his injury.

“Obviously disappointed, but doing pretty well,” Flanagan said of Jenkins’ spirits when reached Friday evening. “He’s obviously done for the season and will be placed on IR whenever is the appropriate time for the Redskins. He’ll probably have surgery next week. Right now the trainers are working to get the swelling down, and thankfully, the swelling isn’t too bad.”

Jenkins on Thursday made his second straight start at right left end and was expected to play a key role in Washington’s upgraded 3-4 defensive front. Of all of the 12 rookies drafted in April, Jenkins was having the finest training camp and preseason, and coaches regularly spoke highly of his play.

“Obviously he was having a great preseason. I’m biased, but I think he was doing fantastic and was on the fast track to starting as a rookie,” Flanagan said. “Any of the coaches would tell you that they were pleased with him. I don’t think this changes the long-term potential that he has to offer the Washington Redskins.”

Jenkins didn’t return voicemail and text messages left for him. Although he had never experienced a major injury during his playing career, knee injuries have run in his family. Jenkins’ father, Larry, and his uncle both were standout football players in high school, but their careers were cut short by torn ACL’s, Larry Jenkins revealed in an interview this summer. Wanting to honor his father and uncle and live out their dreams, Jarvis Jenkins always wore No. 99 because both men had worn No. 9 in high school.

Flanagan, however, is confident that Jarvis Jenkins, because of his work ethic and determination and modern medicine, has plenty of football left in him.

“The good thing is that nowdays, an ACL surgery isn’t rocket science anymore,” Flanagan said. “It’s more like changing a tire. And Jarvis is such a hard worker, that I know he’ll make a full recovery, and probably will be back on the shorter end of what is the normal recovery time for an ACL surgery.”