Redskins coach Mike Shanahan said quarterback Robert Griffin III will visit Dr. James Andrews for more tests and another MRI to determine the extent of a knee injury suffered in Sunday’s 24-14 loss to Seattle.

Griffin underwent an MRI on Monday. The Redskins want him to have another one because, Shanahan said, he’s had previous ACL tears and sometimes those injuries show up on a new MRI. The Redskins want Andrews to examine him and to have Griffin undergo an MRI to make sure what they’re seeing is correct. But Shanahan said he would not speculate on what he thinks is wrong.

Griffin had injured his right knee in a Dec. 9 win over Baltimore, suffering a grade one lateral collateral ligament sprain that caused him to miss one game. But he returned for the final two regular season games as well as the playoff loss. He previously tore the ACL in his right knee at Baylor University in 2009. He returned to play all 13 games the following season and won the Heisman trophy a year later.

Redskins coach Mike Shanahan came under criticism for not pulling Griffin out before his injury Sunday. It was clear Griffin struggled to run – he limped out of bounds after a nine-yard run early in the fourth quarter and could not escape from pressure off a bootleg play on the next series. His knee buckled  on the next play when trying to reach for an errant snap. Griffin lay on the ground as Seattle recovered the fumble.

“I thought we made the right decisions,” Shanahan said.

Griffin re-injured the knee earlier in the game on the second series, running to his right and throwing back across his body. He limped back to the huddle and at times could not plant and throw as he had before that play.

“He’s our starting quarterback,” Redskins receiver Santana Moss said. “If he can go at 60 percent he’s better than half the guys out there. He could barely run the last three or four weeks and he’s still hard to catch. He still got the yards we needed last week. He still made the throws we needed him to throw… There’s always will be something said or asked, critics always criticize. At the end of the day him giving his all that’s all he can do for us and I’m OK with that.”

Players say it’s always tough knowing when to decide not to play because of an injury.

“It’s a slippery slope, I guess you can say, because you want to help the team,” said receiver Pierre Garcon. “But you want to help yourself in the long run and your career.

“You want to look out for all sides, but it’s hard to really know exactly if you’re doing the right thing because if you sit out and the team losses, it’s like `I could probably have helped.’ If you go out there and don’t help the team, it’s like, `I probably should’ve sat out.’ You’ve just got to make a decision and live with it.”

Minnesota running back Adrian Peterson tore the ACL and MCL in his left knee on Dec. 24, 2011 in a game vs. the Redskins. Peterson recovered in time to start the season and rushed for 2,097 yards, second most in NFL history, and 12 touchdowns. But Redskins running back Tim Hightower tore his ACL on Oct. 23 last season and was not 100 percent by training camp and required further surgery after getting cut by Washington before the season. He didn’t play this past season.