For all the buzz about the NFC West's hot young quarterbacks the read option and I'll-bet-you-an-eyebrow wagers defense is at the heart of the rivalry between the Seattle Seahawks and San Francisco 49ers.

And for now the baddest defense in the NFL's best rivalry belongs to the Seahawks after Seattle's 29-3 win at CenturyLink Field.

Seattle thoroughly shut down San Francisco quarterback Colin Kaepernick and the 49ers offense holding Kaepernick to just 127 passing yards. San Francisco receiver Anquan Boldin who had more than 200 receiving yards last week against the Green Bay Packers was held without a catch until the fourth quarter after being shadowed most of the night by cornerback Richard Sherman.

It was Sherman the loudmouth cornerback who sealed Seattle's win with an interception early in the fourth quarter. Sherman out-jumped tight end Vernon Davis directly in front of the Seattle bench and head coach Pete Carroll who was celebrating his 62nd birthday. Sherman raced to the sideline to dance with Seattle's cheerleaders and minutes later blew kisses to the fans seated in the metal bleachers above the north end zone.

Kaepernick was also intercepted by Earl Thomas in the first quarter and Kam Chancellor later in the fourth quarter for the first three-interception game of his career.