As manager Hiroyuki Kobayashi (小林 宏之, 小林宏, Kobayashi Hiroyuki, Kobayashi-Hiro, born June 4, 1978) is a Japanese professional baseball right-handed pitcher.

He played in the 2006 World Baseball Classic for Japan.

As a relief pitcher Kobayashi throws a fastball that sits in 87-91 mph (tops out at 93 mph), silder, change-up, and an effective forkball as his out pitch.

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