SANTA CLARA, Calif. -- Players of the Week play.And that's why Tramaine Brock will continue to be a big part of the San Francisco 49ers' defense.The league honored Brock as the NFC Defensive Player of the Week for his performance in the 49ers' 34-3 win over Houston. Brock had two interceptions in the game, including one he returned 18 yards for a touchdown on the third offensive play of the game. It set the tone for a huge night for the 49ers.