| Kōsuke Sakaguchi | |
| Position: | Pitcher |
| Team: | Tokyo Yakult Swallows |
| Number: | 66 |
| Bats: | Left |
| Throws: | Right |
| Birth Date: | 15 August 1999 |
| Birth Place: | Taishō-ku, Osaka, Japan |
| Debutleague: | NPB |
| Debutdate: | May 3 |
| Debutyear: | 2019 |
| Debutteam: | Yokohama DeNA BayStars |
| Statyear: | 2023 season |
| Stat1label: | Win–loss record |
| Stat1value: | 2-8 |
| Stat2label: | Earned Run Average |
| Stat2value: | 4.86 |
| Stat3label: | Strikeouts |
| Stat3value: | 51 |
| Stat4label: | Saves |
| Stat4value: | 0 |
| Stat5label: | Holds |
| Stat5value: | 2 |
| Teams: |
|
is a professional Japanese baseball player. He plays pitcher for the Tokyo Yakult Swallows.[1] [2]