Kuo Tai-yuan, (Chinese: 郭泰源; traditional Chinese: 郭泰源; pinyin: Guō Tàiyuán; Wade–Giles: Kuo1 Tai2 Yüan2; Japanese: かく たいげん (Kaku Taigen); born March 20, 1962), is a retired Taiwanese NPB baseball pitcher and currently a baseball coach. With 117 wins accumulated during his 13 seasons in the Seibu Lions, Kuo set the record of being the international player who achieves most wins in the NPB history, and is widely regarded as the greatest Taiwanese pitcher before Chien-Ming Wang (Both of them plus Hong-Chih Kuo and Chin-Lung Hu are all Tainan City natives).
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