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Onan Kainoa Satoshi Masaoka (born October 27, 1977) is an American baseball pitcher who played for the Los Angeles Dodgers in 1999 and 2000. Drafted by the Los Angeles Dodgers in the 3rd round of the 1995 MLB amateur draft, Masaoka made his Major League Baseball debut with the Dodgers on April 5, 1999, and appeared in his final game on September 30, 2000. One of the highlights of Masaoka's brief major league career occurred on July 11, 1999. In the final game prior to the All Star Break, Masaoka pitched 4 innings in relief of winning pitcher Darren Dreifort. He picked up the one and only save of his major league career during the Dodgers 14-3 blowout win over the Mariners.