Oklahoma City, OK (AHN) - One sport the U.S. is maintaining its dominance over is softball. Behind the brilliant pitching of Cat Osterman, the U.S. defeated Japan 3-0 on Monday to capture its second consecutive World Cup of Softball title.

Osterman fanned 13 batters in a dominant performance, while Tairia Flowers homered and Crystl Bustos contributed a two-run double to boost the U.S. offense.

Japan's setback was as complete as it was sudden, as baserunner Aki Uenishi was called out for straying off first base when Osterman was ready to pitch to a batter. Uenishi remained on the bag, stunned, while U.S. players lined up to shake hands with their opponent.

The finish should not overshadow Osterman's performance, as the hurler allowed just three hits and only two balls to leave the infield for Japan's offense, which was stifled throughout.

U.S. coach Mike Candrea was pleased with the result, if not how the game ended.

"[It was] a bizarre ending. I hated to see it end that way," Candrea told AP. "I was down writing, so I didn't really get to see what was going on, and then we started walking off the field...I guess rules are rules."

The U.S. and Japan have developed a strong rivalry in the sport, as Japan gave the U.S. its last four setbacks, including the 2005 World Cup championship. The U.S., however, has rolled off 22 straight wins in its current win streak, including six straight victories over Japan.

Flowers' offense was a major reason for the Americans' success this go-around, as she went 6-for-13 at the tournament, smacking three home runs with 12 RBIs.

Flowers is a tough and smart hitter, ripping Monday's double on an 0-2 pitch. Natasha Watley and Jessica Mendoza scored on the play.

The U.S is a perfect 16-0 this year, also winning the Canada Cup. Entering the Pan American Games, the U.S. has outscored opponents by an overwhelming margin of 134-4.