Though it's been noisy this offseason between NFC West rivals the 49ers and Seahawks, it's been nothing compared with the game in Seattle last December.In that Dec. 23 matchup at CenturyLink Field, the Seahawks trampled the Niners 42-13 in perhaps the worst game for San Francisco in the Jim Harbaugh era. Though the 49ers would regroup, hang on to the NFC West title and advance to the Super Bowl, they looked totally overwhelmed that night in a nationally televised wipeout.While the Seattle crowd roared and made it hard for the Niners to function in a stadium known for its hostile environment for visiting teams, the Seahawks exploded to a 21-0 lead and never let up as quarterback Russell Wilson hit 15-of-21 passes for four touchdowns, Marshawn Lynch rushed for 111 yards and Richard Sherman returned a blocked field goal 90 yards for a score.As ESPN.com's Mike Sando noted after that game, the noise at CenturyLink helped knock the 49ers off their game."The 49ers wasted timeouts and took delay penalties while trying to operate amid deafening noise," he wrote. "Some of those issues are understandable, but the 49ers should expect better on that front."Said 49ers safety Donte Whitner after...