Tiger Woods may be in danger of being disqualified from the 2013 Masters.

UPDATE: Woods penalized two strokes | Masters leaderboard and tee times

At issue: Did Woods violate United States Golf Association Rule 26.1 on the 15th hole at Augusta National on Friday, not assess himself a two-stroke penalty, and thus sign an incorrect scorecard?

Masters officials are reviewing the matter this morning, according to multiple reports.

The possible violation involves Woods' play on the par-5 15th hole. He dropped a ball in the fairway after his approach shot on 15 hit the flagstick and rolled into a water hazard. By rule, Woods should have either dropped the ball in a designated drop area near the green; on a line between the flag and where the ball entered the water; or as close to the spot of the initial shot as possible.

Woods chose the third option, but he admitted after the round that he dropped the ball about two yards behind the original spot. Woods also appeared to drop the ball to the left.

"I went down to the drop area, that wasn't going to be a good spot, because obviously it's into the grain and it was a little bit wet," he said, according to a transcript published by ASAPsports.com . "So it was muddy and not a good spot to drop. So I went back to where I played it from, but I went two yards farther back and I tried to take two yards off the shot of what I felt I hit."

According to The Golf Channel's Jason Sobel on Twitter , playing pros told him that Woods violated the rule, but that rules officials (Sobel didn't say whether they were Masters officials) said Woods didn't.

If Masters officials determine today that Woods did break the rule, he would be assesessed the penalty and his second-round score would change to 73. Because Woods claimed a 71 after his round Friday, he would be DQ'd for signing for the wrong score.

Woods' former swing coach Hank Haney said via Twitter that he doesn't believe Woods knowingly violated the rule, but he added that it's very possible that Woods is in trouble. "When he said he dropped 2 yards back i thought he had a problem," Haney wrote .

Haney also wrote that Woods may have been "confused" by the rule .

Woods currently is tied for seventh place , three strokes behind leader Jason Day. Woods is scheduled to tee off at 1:45 p.m. ET .