Tomoya Yagi (八木 智哉, born November 7, 1983, in Yokohama) is a Japanese former professional baseball pitcher in Japan's Nippon Professional Baseball.
He won the Pacific League Rookie of the Year Award in 2006.
He played for the Hokkaido Nippon-Ham Fighters, Orix Buffaloes, and Chunichi Dragons from 2006 to 2017.
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