The Washington region breathed a collective sigh of relief Sunday night when the Washington Redskins announced that rookie quarterback, Robert Griffin III, did not suffer a major knee injury during the team’s win over the Baltimore Ravens. Coach Mike Shanahan announced during a press conference Monday that Griffin has a Grade 1 knee sprain and an MRI showed no structural damage to his knee.

“There are four ligaments in the knee joint that work together to keep the knee stable and protect it from injury,” said Dr. Christopher Magee, Orthopedic Surgeon at The Joint Replacement Center at Washington Adventist Hospital. “A knee sprain means one or more of the ligaments has been overstretched and that there’s damage to some of the fibers. Depending on how many ligaments are involved, a knee sprain is classified as a Grade 1, 2 or 3, with Grade 3 being the most severe.”

The best course of treatment for a knee sprain is typically to rest the knee, use ice to reduce pain and swelling and keep the knee elevated. “A knee brace can help reduce pain and keep the knee stable while it heals,” said Magee. “Grade 3 sprains are most often treated in the same way, depending upon which ligaments are involved, although they’ll take longer to heal.” A doctor may also prescribe a course of exercises to regain the strength, movement and function of the knee.

“Sometimes, depending on the ligament involved, surgery may be advised by a physician,” said Magee.

Shanahan said Griffin will likely wear a brace to support his knee, and that he’s “definitely not ruling him out” for Sunday’s football game against the Cleveland Browns.