SAN DIEGO — Dice-K is more than OK with the World Baseball Classic — and Petco Park.

Pitching in the same ballpark where he led Japan to the inaugural WBC title three years ago, Boston Red Sox ace Daisuke Matsuzaka was brilliant in silencing Cuba's previously undefeated big boppers, leading Japan to a 6-0 win in the second round on Sunday.

Matsuzaka improved to 5-0 in five WBC starts by holding Cuba to five singles in six innings while striking out eight and walking none. The right-hander with the slow-motion windup has two wins in this edition of the WBC and was the MVP in 2006, when he went 3-0.