Tetsuya Yamaguchi
Yamaguchi with the Yomiuri Giants
Yomiuri Giants – No. 71
Pitcher / Coach
Born: (1983-11-11) November 11, 1983 (age 40) Yokohama, Kanagawa, Japan[1]
Batted: Left Threw: Left
NPB debut
April 29, 2007, for the Yomiuri Giants
Last NPB appearance
2018, for the Yomiuri Giants
NPB statistics (through 2018 season)
Win–loss record	52-27
ERA	2.34
Strikeouts	509
Holds	273
Teams
As player Yomiuri Giants (2007–2018) As coach Yomiuri Giants (2020–present)
Career highlights and awards
2008 Central League Rookie of the Year 3× Central League Middle Reliever of the Year (2009, 2012-2013) 2× Japan Series champion (2009, 2012)
Medals Representing  Japan Men's Baseball World Baseball Classic 2009 Los Angeles Team

Tetsuya Yamaguchi (山口 鉄也, Yamaguchi Tetsuya, born November 11, 1983 in Yokohama, Kanagawa, Japan) is a former Japanese Nippon Professional Baseball player with the Yomiuri Giants in Japan's Central League.

Career

He was playing in the Missoula Osprey (Advanced Rookie level under Arizona Diamondbacks) before he was drafted by the Giants in 2005.

He was awarded as Central League's Rookie of the Year in 2008, beating his teammate and another award favorite Hayato Sakamoto, by finishing with an 11-2 with 67 appearances, the most wins of all-time in Giants' relief pitchers.

On October 5, 2018, he announced retirement after the season.^[2]

International career

He was selected Japan national baseball team at the 2009 World Baseball Classic and 2013 World Baseball Classic.