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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mack MacDonald | 0-4 | 10 | 7 | .588 | 2.47 | 26 | 26 | 0 | 0 | 0 | 167.1 | 112 | 46 | 10 | 54 | 210 |
| Felipe Machado | 0-2024 | 2 | 3 | .400 | 2.87 | 13 | 10 | 0 | 0 | 0 | 69.0 | 67 | 22 | 2 | 24 | 75 |
| Tony Machado | 0-0 | 2 | 5 | .286 | 3.48 | 41 | 2 | 1 | 0 | 17 | 54.1 | 50 | 21 | 3 | 22 | 56 |
| Daniel Mack | 0-2025 | 2 | 0 | 1.000 | 3.91 | 9 | 1 | 0 | 0 | 0 | 25.1 | 26 | 11 | 2 | 10 | 20 |
| Sam MacKerras | 0-2022 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 |
| Kyle MacRae | 0-2025 | 3 | 4 | .429 | 3.71 | 47 | 0 | 0 | 0 | 1 | 85.0 | 81 | 35 | 6 | 34 | 114 |
| Ron Madison | 0-2021 | 10 | 6 | .625 | 2.05 | 23 | 23 | 7 | 2 | 0 | 175.1 | 135 | 40 | 2 | 68 | 180 |
| Enrique Madrid | 4-2023 | 14 | 18 | .438 | 2.45 | 53 | 45 | 3 | 1 | 0 | 327.1 | 252 | 89 | 12 | 108 | 369 |
| Rubén Madrid | 0-2023 | 7 | 5 | .583 | 3.60 | 20 | 20 | 0 | 0 | 0 | 132.1 | 134 | 53 | 3 | 50 | 119 |
| Santiago Maes | 0-2023 | 5 | 9 | .357 | 3.92 | 21 | 19 | 0 | 0 | 1 | 121.2 | 114 | 53 | 1 | 35 | 117 |
| Reynaldo Maestas | 1-2025 | 7 | 11 | .389 | 3.02 | 63 | 21 | 0 | 0 | 18 | 173.0 | 156 | 58 | 7 | 55 | 171 |
| Ken Maksimenov | 0-0 | 0 | 0 | .000 | 1.96 | 7 | 0 | 0 | 0 | 1 | 18.1 | 9 | 4 | 1 | 5 | 15 |
| Marvin Mangin | 0-2022 | 2 | 7 | .222 | 4.29 | 21 | 11 | 2 | 0 | 0 | 77.2 | 88 | 37 | 8 | 29 | 60 |
| Sébastien Marchand | 0-2025 | 6 | 6 | .500 | 3.50 | 19 | 19 | 0 | 0 | 0 | 128.2 | 124 | 50 | 3 | 34 | 131 |
| Stephen Marchbanks | 0-2025 | 0 | 0 | .000 | 0.57 | 6 | 0 | 0 | 0 | 0 | 15.2 | 13 | 1 | 1 | 8 | 9 |
| António Marés | 3-2022 | 19 | 14 | .576 | 2.47 | 49 | 48 | 14 | 2 | 0 | 353.1 | 286 | 97 | 18 | 96 | 417 |
| Esteban Marino | 0-2024 | 5 | 4 | .556 | 2.82 | 12 | 12 | 1 | 1 | 0 | 70.1 | 65 | 22 | 7 | 26 | 73 |
| Tyrone Marone | 0-2025 | 1 | 0 | 1.000 | 3.86 | 1 | 0 | 0 | 0 | 0 | 2.1 | 2 | 1 | 1 | 1 | 2 |
| Marvin Martin | 0-2023 | 7 | 6 | .538 | 3.38 | 18 | 16 | 1 | 1 | 1 | 106.2 | 88 | 40 | 5 | 33 | 81 |
| Alonso Martínez | 0-2025 | 5 | 3 | .625 | 3.75 | 20 | 4 | 1 | 0 | 2 | 50.1 | 40 | 21 | 3 | 21 | 58 |
| Cristián Martínez | 0-0 | 2 | 2 | .500 | 3.80 | 23 | 0 | 0 | 0 | 0 | 47.1 | 58 | 20 | 4 | 14 | 33 |
| Daniel Martínez | 3-2019 | 10 | 8 | .556 | 3.06 | 25 | 25 | 7 | 2 | 0 | 194.1 | 197 | 66 | 7 | 52 | 183 |
| Francisco Martínez | 0-2025 | 4 | 1 | .800 | 2.75 | 14 | 0 | 0 | 0 | 2 | 19.2 | 18 | 6 | 0 | 7 | 17 |
| Mariano Martínez | 0-2024 | 3 | 7 | .300 | 3.84 | 32 | 16 | 0 | 0 | 1 | 124.1 | 114 | 53 | 8 | 46 | 128 |
| Pedro Martínez | 0-2023 | 0 | 0 | .000 | 1.10 | 10 | 0 | 0 | 0 | 4 | 16.1 | 9 | 2 | 0 | 5 | 15 |
| Rafael Martínez | 0-2024 | 0 | 0 | .000 | 0.00 | 2 | 0 | 0 | 0 | 0 | 2.2 | 1 | 0 | 0 | 3 | 6 |
| Ramón Martínez | 0-2025 | 5 | 9 | .357 | 3.70 | 31 | 15 | 1 | 0 | 1 | 119.1 | 108 | 49 | 7 | 48 | 108 |
| Nick Mason | 0-2024 | 3 | 3 | .500 | 4.07 | 11 | 11 | 0 | 0 | 0 | 66.1 | 63 | 30 | 5 | 22 | 50 |
| Javier Matajudíos | 1-2025 | 5 | 13 | .278 | 3.73 | 32 | 21 | 3 | 1 | 0 | 173.2 | 194 | 72 | 5 | 63 | 140 |
| Emílio Mavarro | 0-2025 | 0 | 4 | .000 | 4.64 | 10 | 8 | 0 | 0 | 0 | 42.2 | 50 | 22 | 1 | 12 | 48 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Leif Mayer | 0-2022 | 9 | 8 | .529 | 3.37 | 21 | 21 | 2 | 1 | 0 | 141.1 | 138 | 53 | 6 | 41 | 137 |
| Rick Mayer | 0-2021 | 2 | 7 | .222 | 3.66 | 13 | 12 | 0 | 0 | 0 | 71.1 | 70 | 29 | 2 | 20 | 82 |
| Billy Mays | 0-2025 | 3 | 4 | .429 | 6.75 | 16 | 4 | 0 | 0 | 0 | 26.2 | 31 | 20 | 2 | 10 | 20 |
| Brandon McAllister | 0-2024 | 6 | 10 | .375 | 4.29 | 25 | 20 | 4 | 1 | 1 | 159.1 | 186 | 76 | 10 | 49 | 108 |
| Dan McBride | 0-2021 | 1 | 4 | .200 | 5.31 | 17 | 2 | 0 | 0 | 0 | 39.0 | 49 | 23 | 4 | 15 | 30 |
| Gerard McCall | 0-2025 | 3 | 7 | .300 | 2.76 | 26 | 13 | 1 | 0 | 0 | 114.1 | 95 | 35 | 6 | 34 | 96 |
| Ty McDaniel | 0-2025 | 2 | 4 | .333 | 2.59 | 40 | 0 | 0 | 0 | 4 | 31.1 | 32 | 9 | 2 | 17 | 30 |
| Robby McDonald | 0-2021 | 3 | 3 | .500 | 2.56 | 6 | 6 | 0 | 0 | 0 | 45.2 | 42 | 13 | 1 | 9 | 33 |
| Thomas McGinnis | 0-2023 | 8 | 15 | .348 | 3.79 | 36 | 28 | 3 | 0 | 1 | 180.1 | 182 | 76 | 9 | 71 | 122 |
| Bryan McKinney | 0-2025 | 9 | 2 | .818 | 2.76 | 31 | 12 | 0 | 0 | 2 | 117.1 | 100 | 36 | 7 | 29 | 118 |
| Nord Mead | 0-0 | 0 | 0 | .000 | 4.76 | 4 | 0 | 0 | 0 | 0 | 5.2 | 3 | 3 | 0 | 4 | 7 |
| Carlos Medina | 0-2025 | 1 | 1 | .500 | 4.76 | 6 | 1 | 0 | 0 | 2 | 11.1 | 18 | 6 | 0 | 3 | 10 |
| Jesús Medina | 0-2024 | 5 | 6 | .455 | 3.32 | 13 | 13 | 2 | 1 | 0 | 89.1 | 70 | 33 | 3 | 30 | 108 |
| Jorge Méndez | 3-2022 | 11 | 13 | .458 | 3.18 | 34 | 30 | 3 | 1 | 0 | 215.1 | 177 | 76 | 2 | 76 | 231 |
| Lorenzo Méndez | 0-2025 | 0 | 0 | .000 | 4.29 | 22 | 0 | 0 | 0 | 1 | 35.2 | 44 | 17 | 2 | 9 | 24 |
| Alberto Mendoza | 0-4 | 11 | 5 | .688 | 2.13 | 20 | 20 | 3 | 1 | 0 | 152.1 | 107 | 36 | 8 | 39 | 152 |
| Iván Mendoza | 0-2025 | 3 | 2 | .600 | 3.02 | 37 | 0 | 0 | 0 | 5 | 50.2 | 42 | 17 | 2 | 21 | 62 |
| Manny Merico | 0-2025 | 0 | 1 | .000 | 0.00 | 4 | 0 | 0 | 0 | 0 | 4.2 | 5 | 0 | 0 | 3 | 5 |
| Santiago Mesa | 0-2022 | 3 | 2 | .600 | 3.27 | 7 | 7 | 0 | 0 | 0 | 41.1 | 35 | 15 | 0 | 15 | 38 |
| Tommy Middleton | 4-2020 | 12 | 10 | .545 | 3.24 | 72 | 20 | 7 | 2 | 7 | 203.0 | 176 | 73 | 9 | 57 | 239 |
| Scott Mildren | 0-2023 | 3 | 5 | .375 | 2.75 | 15 | 14 | 0 | 0 | 0 | 78.2 | 83 | 24 | 0 | 29 | 54 |
| Bill Mills | 0-0 | 1 | 0 | 1.000 | 3.12 | 10 | 0 | 0 | 0 | 1 | 17.1 | 13 | 6 | 0 | 5 | 15 |
| Freddy Miranda | 0-6 | 3 | 1 | .750 | 4.21 | 23 | 0 | 0 | 0 | 7 | 25.2 | 30 | 12 | 4 | 9 | 35 |
| Stanton Miranda | 0-2021 | 3 | 5 | .375 | 4.20 | 19 | 6 | 0 | 0 | 2 | 49.1 | 49 | 23 | 3 | 16 | 42 |
| Raúl Molina | 0-2025 | 1 | 3 | .250 | 4.11 | 19 | 0 | 0 | 0 | 1 | 46.0 | 50 | 21 | 3 | 17 | 33 |
| Valentín Montenegro | 0-2024 | 5 | 2 | .714 | 4.31 | 17 | 6 | 0 | 0 | 3 | 48.0 | 60 | 23 | 1 | 13 | 48 |
| Gonzalo Montés | 6-2025 | 19 | 13 | .594 | 2.59 | 57 | 42 | 8 | 3 | 5 | 305.2 | 234 | 88 | 10 | 79 | 368 |
| Manuel Montés | 1-2025 | 9 | 12 | .429 | 4.65 | 32 | 19 | 1 | 0 | 1 | 143.1 | 169 | 74 | 2 | 52 | 104 |
| Juan Montoya | 0-2023 | 6 | 8 | .429 | 3.54 | 22 | 22 | 1 | 0 | 0 | 150.0 | 134 | 59 | 5 | 54 | 171 |
| José Morales | 0-2025 | 1 | 2 | .333 | 0.86 | 22 | 0 | 0 | 0 | 8 | 21.0 | 11 | 2 | 1 | 8 | 21 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Lorenzo Morán | 0-0 | 1 | 1 | .500 | 5.52 | 9 | 2 | 0 | 0 | 0 | 14.2 | 18 | 9 | 1 | 6 | 11 |
| Nathan Moree | 0-2025 | 6 | 8 | .429 | 4.88 | 18 | 18 | 0 | 0 | 0 | 97.2 | 120 | 53 | 4 | 32 | 52 |
| Marc Morgan | 0-2025 | 2 | 4 | .333 | 5.73 | 11 | 4 | 1 | 0 | 0 | 44.0 | 54 | 28 | 3 | 23 | 41 |
| Melvin Morgan | 0-2022 | 0 | 3 | .000 | 4.25 | 8 | 4 | 0 | 0 | 1 | 29.2 | 31 | 14 | 1 | 17 | 22 |
| Dave Morse | 0-2024 | 9 | 3 | .750 | 2.55 | 15 | 15 | 0 | 0 | 0 | 88.1 | 68 | 25 | 4 | 26 | 93 |
| Alonso Muńíz | 0-2024 | 3 | 1 | .750 | 0.97 | 35 | 0 | 0 | 0 | 9 | 37.0 | 22 | 4 | 0 | 13 | 42 |
| Augusto Muńóz | 0-2025 | 1 | 0 | 1.000 | 0.96 | 5 | 0 | 0 | 0 | 0 | 9.1 | 5 | 1 | 0 | 6 | 6 |
| José Muńóz | 0-2025 | 8 | 9 | .471 | 4.02 | 20 | 20 | 0 | 0 | 0 | 123.0 | 124 | 55 | 7 | 53 | 101 |
| Ciríaco Muro | 0-2024 | 7 | 8 | .467 | 2.70 | 22 | 22 | 1 | 0 | 0 | 146.2 | 123 | 44 | 6 | 49 | 138 |
| Christian Mustard | 0-2025 | 0 | 3 | .000 | 3.25 | 29 | 1 | 0 | 0 | 6 | 36.0 | 35 | 13 | 2 | 15 | 41 |
| Cooper Myers | 0-4 | 2 | 0 | 1.000 | 2.33 | 11 | 6 | 0 | 0 | 0 | 54.0 | 49 | 14 | 2 | 13 | 41 |
