who knew?

ANAHEIM -- Who are these guys, anyway?

The only unbeaten team in the World Baseball Classic powered its way to another victory Monday night as surprisingly adept-at-everything Korea defeated Team USA, 7-3, before 21,288 at Angel Stadium.

First baseman Seung-Yeop Lee hit another home run, his fifth of the tournament, Hee-Seop Choi slugged his first -- in a pinch-hit role -- and the Korea pitching staff stymied the best lineup it has seen so far in the 16-team tournament as Korea improved to 2-0 in Round 2 and 5-0 overall.

Korea is sitting in the semifinals cat-bird seat heading into Wednesday night's game against Japan. The top two teams here advance to the semis in San Diego. Japan, Mexico and the United States each have one loss in this round-robin. If Mexico beats Japan Tuesday night, Korea reaches the semis.

"Something happened tonight which nobody could believe," Korea manager In Sik Kim said. "Not just the USA team, which is (some) of the best of all the best Major Leaguers, but our players (beat) these players and it's very difficult to believe what happened.

"But this is baseball and you never know what might happen."