It was the second big miscue for Leavy's crew in the season's first three weeks.
Frazier threw the red flag to challenge. But NFL rules stipulate changes of possession can only be reviewed from the booth. Leavy then issued a 15-yard penalty for unsportsmanlike conduct.
The error proved costly for the Vikings. Instead of a first-and-10 at the Browns' 26 with two timeouts and over two minutes remaining in the first half, the Vikings were pushed back to a first-and-25 at the Cleveland 41. After three passes from Christian Ponder, they settled for a 43-yard field goal by Blair Walsh.
"It turned out to be a muff, which you can't review," Frazier said. "Should've been a timeout (taken away), but they walked off 15. Not sure why. But I can't throw the red flag in that situation."
After a third-and-6 play at the Green Bay 10-yard line in the second quarter, quarterback Colin Kaepernick was hit out of bounds by Packers linebacker Clay Matthews, who was given a personal foul penalty. Niners tackle Joe Staley also received an unsportsmanlike conduct on the play. The league said the penalties were dead-ball fouls and the ball should have been spotted at the Packers' 3 for a first down.
Leavy acknowledged the error after that game as well.
Copyright 2013 by The Associated Press