A 25-year-old Japanese right-hander, Matsuoka (2-0) yielded five hits and struck out six without walking a batter. He helped thrust the BeachBoys (18-19) into Monday's Championship Game against the league-leading North Shore Honu.
In six Hawaii appearances, Matsuoka did not allow an earned run, yielding 16 hits and six walks while fanning 24 over 23 2/3 frames. He pitches for the Tokyo Yakult Swallows in Japan's Central League during the regular season.
Rockies prospect Zach Simons finished up, allowing three runs on three hits over two innings with a walk and two strikeouts.
Mets farmhand Dan Murphy broke out of a 3-for-25 slump in the fifth with a three-run homer, his fourth. Justin Sellers (Athletics) went 3-for-4 with an RBI and a run scored, Lucas Duda chipped in two singles and an RBI and fellow Mets Minor Leaguer Hector Pellot scored twice for Waikiki.
Sharks starter Shingo Matsuzaki (1-3) was charged with four runs on four hits over 4 2/3 innings. He struck out six and walked four.
Honolulu (17-20) was blanked until the ninth, when Braves prospect Tyler Flowers launched a two-out three-run homer, his third.
Michael Blinn is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.