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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
|---|---|---|---|---|---|---|---|---|---|
| Kichibei Kamuta | 2010-2011 | .343 | 1 | 7 | 7 | 5 | 0 | 2.95 | 64 |
| Nobuhito Karube | 2020-2020 | .000 | 0 | 0 | 0 | 0 | 0 | 3.75 | 15 |
| Masafumi Kato | 2016-2016 | .059 | 0 | 0 | 2 | 4 | 0 | 4.10 | 29 |
| Tokimasa Kato | 2020-2021 | .000 | 0 | 0 | 1 | 1 | 0 | 3.28 | 35 |
| Yosai Kikuchi | 2014-2014 | .000 | 0 | 0 | 1 | 0 | 1 | 6.75 | 12 |
| Kazuyoshi Kimura | 2007-2011 | .042 | 0 | 1 | 16 | 19 | 0 | 5.28 | 129 |
| King King | 2013-2013 | .000 | 0 | 0 | 2 | 4 | 2 | 4.46 | 26 |
| Hiroya Kobayashi | 2009-2013 | .111 | 0 | 0 | 5 | 4 | 0 | 4.40 | 69 |
| Keitaro Kodo | 2020-2021 | .000 | 0 | 0 | 0 | 0 | 0 | 6.23 | 7 |
| Josuke Kogawa | 2018-2018 | .000 | 0 | 0 | 0 | 1 | 0 | 3.12 | 10 |
| Osamu Kohara | 2015-2019 | .200 | 0 | 0 | 5 | 6 | 3 | 3.06 | 90 |
| Tomokazu Komatsu | 2017-2017 | .000 | 0 | 0 | 1 | 3 | 0 | 4.63 | 11 |
