Career
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. The White Sox assigned him to the American Automobile Association Charlotte Knights but released him after the season ended. He next played professionally with the Gary SouthShore RailCats of the Northern League in 2009 and signed with his hometown Hawaii Stars of the Pacific Association for 2013.