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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mikael Rajalahti | 1931-1932 | 4 | 6 | .400 | 4.16 | 24 | 11 | 5 | 0 | 0 | 93.0 | 97 | 43 | 7 | 18 | 53 |
| Mainio Rantamaa | 1931-1933 | 13 | 18 | .419 | 3.22 | 206 | 0 | 0 | 0 | 49 | 301.2 | 272 | 108 | 30 | 96 | 320 |
| Kaspar Raussi | 1931-1932 | 1 | 0 | 1.000 | 4.17 | 32 | 0 | 0 | 0 | 0 | 45.1 | 44 | 21 | 9 | 24 | 45 |
| Urho Reima | 1932-1932 | 2 | 1 | .667 | 7.48 | 40 | 0 | 0 | 0 | 0 | 61.1 | 88 | 51 | 17 | 38 | 46 |
| Valle Riihilahti | 1931-1932 | 2 | 4 | .333 | 5.03 | 88 | 0 | 0 | 0 | 2 | 105.2 | 123 | 59 | 10 | 58 | 59 |
| Kerkko Rikkonen | 1931-1932 | 3 | 3 | .500 | 5.43 | 41 | 0 | 0 | 0 | 1 | 53.0 | 55 | 32 | 3 | 23 | 44 |
| Otto Risku | 1931-1932 | 0 | 2 | .000 | 7.42 | 19 | 0 | 0 | 0 | 1 | 26.2 | 33 | 22 | 3 | 19 | 23 |
| Sven Rönn | 1931-1932 | 7 | 8 | .467 | 4.97 | 38 | 15 | 8 | 0 | 0 | 163.0 | 183 | 90 | 27 | 46 | 67 |
| Mika Ruuska | 1931-1932 | 2 | 2 | .500 | 4.05 | 48 | 0 | 0 | 0 | 1 | 60.0 | 68 | 27 | 4 | 38 | 42 |
