| Koki Yamaguchi | |
|---|---|
 | |
| Chiba Lotte Marines – No. 51 | |
| Outfielder, First Baseman | |
| Born: August 18, 2000 Hirano-ku, Osaka, Japan | |
Bats: Right Throws: Right | |
| Career statistics (through 2022 season) | |
| Batting average | .225 |
| Hits | 118 |
| Home runs | 25 |
| Runs batted in | 77 |
| Stolen base | 1 |
| Teams | |
| |
Koki Yamaguchi (山口 航輝, Yamaguchi Kōki, born August 8, 2000) is a professional Japanese baseball player. Selected in the fourth round of the 2018 NPB Draft from Meioh High School in Akita Prefecture,[1] he plays outfield and first base for the Chiba Lotte Marines.