(By GREGG BELL, AP Sports Writer) Saying "I'll go to my grave" with regret, NFL referee Bill Leavy reopened a Seahawks' wound that won't heal by acknowledging he made mistakes in Seattle's disputed, 2006 Super Bowl loss to the Pittsburgh Steelers.The veteran official began an annual training-camp rules interpretation session with the Seattle media after practice on Friday by bringing up the sore subject without being asked.