NFL referee Bill Leavy has acknowledged he made mistakes in the Seattle's 2006 Super Bowl loss to Pittsburgh. "It was a tough thing for me. I kicked two calls in the fourth quarter and I impacted the game, and as an official you never want to do that," said the veteran of 15 NFL seasons and two Super Bowls. "It left me with a lot of sleepless nights, and I think about it constantly," Leavy said of the game in February 2006. "I'll go to my grave wishing that I'd been better." Several calls went against the Seahawks in their 21-10 loss to the Steelers.