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| "A" Pitching Register | |
| Batting Register | Pitching Glossary |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO | PWS |
| Filiberto Abarca | 2011-2019 | 56 | 64 | .467 | 4.11 | 192 | 155 | 8 | 3 | 0 | 1053.0 | 1090 | 481 | 91 | 367 | 474 | 41.3 |
| Miquel Abarca | 2000-2003 | 10 | 14 | .417 | 4.36 | 256 | 1 | 0 | 0 | 7 | 260.3 | 264 | 126 | 44 | 73 | 277 | 11.0 |
| Murray Abbey | 2000-2008 | 80 | 97 | .452 | 3.71 | 307 | 225 | 49 | 8 | 3 | 1691.6 | 1568 | 697 | 190 | 343 | 1049 | 74.2 |
| Joseph Abril | 2010-2025 | 39 | 46 | .459 | 4.34 | 779 | 0 | 0 | 0 | 43 | 757.0 | 710 | 365 | 50 | 401 | 466 | 43.3 |
| Paul Absher | 2007-2013 | 18 | 28 | .391 | 4.57 | 371 | 0 | 0 | 0 | 10 | 366.0 | 360 | 186 | 32 | 204 | 177 | 11.9 |
| Brian Abshire | 2017-2018 | 2 | 2 | .500 | 3.09 | 18 | 0 | 0 | 0 | 0 | 32.0 | 28 | 11 | 4 | 16 | 18 | 1.7 |
| Alex Acevedo | 2021-2029 | 9 | 60 | .130 | 5.21 | 107 | 94 | 6 | 1 | 0 | 580.6 | 641 | 336 | 78 | 188 | 182 | 11.2 |
| James Acosta | 2027-2029 | 10 | 19 | .345 | 5.63 | 80 | 25 | 2 | 0 | 2 | 207.7 | 240 | 130 | 35 | 76 | 102 | 1.6 |
| Jose Acosta | 2000-2005 | 9 | 15 | .375 | 5.39 | 158 | 2 | 0 | 0 | 0 | 163.7 | 166 | 98 | 21 | 70 | 89 | 6.9 |
| Vincent Acosta | 2004-2004 | 0 | 3 | .000 | 5.08 | 5 | 5 | 0 | 0 | 0 | 28.3 | 30 | 16 | 1 | 12 | 28 | 0.2 |
| Rafael Acuņa | 2020-2020 | 1 | 3 | .250 | 4.69 | 31 | 0 | 0 | 0 | 1 | 40.3 | 48 | 21 | 4 | 25 | 14 | 0.5 |
| Joe Adams | 2000-2002 | 22 | 21 | .512 | 3.19 | 110 | 55 | 2 | 1 | 3 | 392.3 | 364 | 139 | 21 | 144 | 275 | 24.2 |
| Randy Adkins | 2001-2001 | 0 | 1 | .000 | 18.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 2 | 2 | 0 | 2 | 0 | 0.0 |
| Jamie Agee | 2005-2021 | 156 | 185 | .457 | 3.42 | 556 | 479 | 15 | 8 | 1 | 3207.3 | 2751 | 1220 | 149 | 1333 | 2165 | 168.1 |
| Amor Aguaijo | 2018-2029 | 66 | 59 | .528 | 3.05 | 881 | 0 | 0 | 0 | 398 | 971.3 | 957 | 329 | 49 | 174 | 553 | 144.8 |
| Salvador Aguilar | 2008-2015 | 19 | 16 | .543 | 3.93 | 331 | 7 | 0 | 0 | 13 | 377.7 | 309 | 165 | 55 | 141 | 255 | 23.0 |
| Pedro Agurries | 2024-2028 | 7 | 16 | .304 | 6.84 | 144 | 11 | 0 | 0 | 5 | 202.7 | 274 | 154 | 23 | 120 | 49 | 0.8 |
| John Airth | 2019-2029 | 18 | 18 | .500 | 3.54 | 402 | 0 | 0 | 0 | 11 | 493.3 | 513 | 194 | 46 | 116 | 197 | 34.3 |
| Curtis Albarran | 2005-2011 | 87 | 76 | .534 | 3.66 | 223 | 223 | 36 | 7 | 0 | 1584.0 | 1415 | 645 | 181 | 487 | 715 | 72.8 |
| Alaska Albers | 2018-2022 | 12 | 22 | .353 | 5.16 | 63 | 45 | 0 | 0 | 1 | 295.0 | 324 | 169 | 30 | 149 | 125 | 5.0 |
| Barney Albuerne | 2015-2029 | 144 | 114 | .558 | 3.77 | 386 | 353 | 24 | 7 | 0 | 2324.6 | 2414 | 973 | 151 | 262 | 954 | 125.3 |
| Andrew Albury | 2001-2014 | 175 | 99 | .639 | 3.25 | 413 | 350 | 36 | 21 | 0 | 2407.3 | 2422 | 868 | 95 | 495 | 1601 | 146.5 |
| Benjamin Alcala | 2000-2014 | 147 | 132 | .527 | 3.69 | 417 | 363 | 70 | 15 | 0 | 2609.6 | 2833 | 1069 | 202 | 818 | 1169 | 136.4 |
| Samuel Alejo | 2000-2000 | 5 | 5 | .500 | 4.62 | 11 | 11 | 0 | 0 | 0 | 62.3 | 81 | 32 | 9 | 26 | 39 | 1.5 |
| Johnny Alewine | 2017-2018 | 1 | 2 | .333 | 2.57 | 25 | 0 | 0 | 0 | 1 | 28.0 | 20 | 8 | 1 | 9 | 9 | 2.8 |
| James Alexander | 2011-2026 | 186 | 116 | .616 | 3.29 | 414 | 414 | 50 | 22 | 0 | 2806.6 | 2420 | 1027 | 319 | 393 | 1962 | 176.5 |
| Jonathan Alexander | 2019-2029 | 144 | 93 | .608 | 3.08 | 345 | 338 | 16 | 9 | 0 | 2154.6 | 1851 | 737 | 70 | 725 | 1312 | 153.4 |
| Tom Alexis | 2027-2029 | 5 | 8 | .385 | 3.86 | 171 | 0 | 0 | 0 | 22 | 198.3 | 209 | 85 | 7 | 79 | 66 | 18.0 |
| Sain Allen | 2026-2029 | 21 | 22 | .488 | 3.75 | 79 | 79 | 2 | 2 | 0 | 465.7 | 425 | 194 | 45 | 129 | 266 | 26.0 |
| Stanton Allen | 2021-2025 | 6 | 8 | .429 | 7.82 | 101 | 0 | 0 | 0 | 2 | 101.3 | 158 | 88 | 15 | 52 | 41 | 0.0 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO | PWS |
| William Allen | 2000-2003 | 10 | 9 | .526 | 3.52 | 163 | 0 | 0 | 0 | 2 | 189.0 | 162 | 74 | 22 | 67 | 117 | 14.2 |
| Rogers Allsby | 2013-2017 | 2 | 0 | 1.000 | 1.39 | 5 | 3 | 1 | 0 | 0 | 26.0 | 23 | 4 | 1 | 9 | 14 | 3.2 |
| Jackie Almanza | 2002-2013 | 82 | 68 | .547 | 3.70 | 553 | 133 | 3 | 1 | 165 | 1198.0 | 1026 | 493 | 167 | 312 | 672 | 84.8 |
| Floyd Alonso | 2000-2004 | 26 | 18 | .591 | 4.05 | 265 | 0 | 0 | 0 | 6 | 288.7 | 252 | 130 | 28 | 87 | 187 | 19.8 |
| Roderick Alonso | 2005-2015 | 19 | 15 | .559 | 3.58 | 131 | 50 | 2 | 1 | 5 | 400.0 | 386 | 159 | 48 | 112 | 123 | 23.6 |
| Luis Alou | 2014-2028 | 95 | 63 | .601 | 2.86 | 638 | 125 | 0 | 0 | 9 | 1429.6 | 1305 | 454 | 42 | 472 | 616 | 112.0 |
| Tristano Alou | 2008-2019 | 19 | 10 | .655 | 3.59 | 224 | 4 | 0 | 0 | 7 | 325.6 | 310 | 130 | 40 | 101 | 229 | 20.8 |
| Jay Alston | 2023-2029 | 50 | 78 | .391 | 4.04 | 202 | 201 | 1 | 1 | 0 | 1169.6 | 1013 | 525 | 136 | 513 | 852 | 55.7 |
| Geraldo Altamar | 2023-2029 | 34 | 35 | .493 | 4.31 | 505 | 1 | 0 | 0 | 20 | 624.3 | 671 | 299 | 48 | 239 | 223 | 34.3 |
| Jose Altamirano | 2014-2020 | 33 | 72 | .314 | 4.99 | 195 | 125 | 2 | 1 | 2 | 820.3 | 858 | 455 | 107 | 321 | 362 | 16.9 |
| Omar Alvarado | 2003-2012 | 46 | 27 | .630 | 3.35 | 554 | 0 | 0 | 0 | 11 | 609.3 | 620 | 227 | 41 | 137 | 297 | 46.1 |
| Angelo Alvarez | 2023-2025 | 5 | 11 | .313 | 8.12 | 150 | 0 | 0 | 0 | 2 | 170.7 | 199 | 154 | 23 | 130 | 46 | 2.9 |
| Jesus Alvarenga | 2005-2012 | 10 | 20 | .333 | 3.27 | 286 | 0 | 0 | 0 | 9 | 294.7 | 267 | 107 | 26 | 121 | 243 | 21.8 |
| Angelo Ambriz | 2000-2006 | 36 | 54 | .400 | 4.37 | 170 | 133 | 3 | 2 | 1 | 842.0 | 848 | 409 | 110 | 278 | 491 | 15.7 |
| Ernesto Ambriz | 2000-2003 | 2 | 4 | .333 | 3.64 | 43 | 5 | 1 | 0 | 0 | 76.7 | 88 | 31 | 9 | 18 | 49 | 3.5 |
| Damian Amezaga | 2017-2017 | 0 | 2 | .000 | 7.27 | 7 | 0 | 0 | 0 | 0 | 8.7 | 14 | 7 | 2 | 8 | 5 | 0.0 |
| Zachary Ammons | 2015-2020 | 11 | 15 | .423 | 4.67 | 214 | 0 | 0 | 0 | 2 | 198.3 | 216 | 103 | 28 | 49 | 88 | 5.3 |
| Omar Anaya | 2012-2025 | 7 | 38 | .156 | 4.68 | 160 | 113 | 0 | 0 | 1 | 409.7 | 416 | 213 | 37 | 184 | 189 | 11.3 |
| Benicio Andaverde | 2016-2029 | 179 | 131 | .577 | 3.31 | 409 | 407 | 35 | 18 | 0 | 2653.3 | 2390 | 976 | 96 | 764 | 1468 | 178.2 |
| Jeffrey Anderson | 2021-2029 | 25 | 59 | .298 | 4.64 | 160 | 105 | 4 | 2 | 1 | 695.0 | 689 | 358 | 47 | 415 | 237 | 32.5 |
| John Andujar | 2018-2029 | 110 | 137 | .445 | 3.70 | 357 | 355 | 28 | 14 | 1 | 2299.3 | 2204 | 944 | 136 | 738 | 1275 | 114.2 |
| Alvin Anguiano | 2000-2005 | 23 | 14 | .622 | 4.54 | 313 | 0 | 0 | 0 | 4 | 367.0 | 367 | 185 | 55 | 142 | 223 | 16.0 |
| Genaro Anzalone | 2006-2017 | 53 | 43 | .552 | 3.30 | 875 | 1 | 0 | 0 | 88 | 850.0 | 797 | 312 | 92 | 215 | 529 | 76.3 |
| Francisco Aparicio | 2001-2007 | 12 | 19 | .387 | 7.12 | 241 | 0 | 0 | 0 | 1 | 235.0 | 270 | 186 | 71 | 138 | 158 | 2.8 |
| Rafael Aparicio | 2000-2003 | 12 | 8 | .600 | 3.79 | 184 | 0 | 0 | 0 | 2 | 206.7 | 171 | 87 | 35 | 59 | 148 | 13.4 |
| Francisco Apodaca | 2002-2017 | 75 | 70 | .517 | 3.23 | 1202 | 0 | 0 | 0 | 34 | 1344.3 | 1222 | 482 | 92 | 272 | 1017 | 114.5 |
| David Aquilar | 2004-2014 | 36 | 34 | .514 | 4.27 | 713 | 0 | 0 | 0 | 21 | 670.3 | 591 | 318 | 66 | 325 | 485 | 36.1 |
| Andre Aranda | 2022-2025 | 1 | 24 | .040 | 6.15 | 84 | 82 | 0 | 0 | 0 | 134.7 | 162 | 92 | 25 | 76 | 47 | 0.7 |
| Leandro Aranda | 2000-2010 | 66 | 62 | .516 | 3.37 | 444 | 104 | 4 | 3 | 104 | 1055.3 | 925 | 395 | 113 | 249 | 787 | 91.5 |
| Inocente Arcocha | 2029-2029 | 2 | 3 | .400 | 4.20 | 11 | 11 | 0 | 0 | 0 | 70.7 | 80 | 33 | 7 | 22 | 40 | 3.5 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO | PWS |
| Alfonso Arevalo | 2000-2011 | 157 | 82 | .657 | 3.50 | 354 | 337 | 12 | 7 | 4 | 2110.6 | 1803 | 820 | 202 | 784 | 1893 | 115.7 |
| Jaime Argente | 2026-2028 | 5 | 8 | .385 | 4.67 | 30 | 14 | 1 | 1 | 0 | 98.3 | 115 | 51 | 9 | 30 | 43 | 1.9 |
| Robert Armstrong | 2009-2010 | 0 | 2 | .000 | 6.03 | 66 | 0 | 0 | 0 | 1 | 71.7 | 99 | 48 | 14 | 25 | 11 | 0.0 |
| Marvin Arnott | 2000-2010 | 109 | 107 | .505 | 3.62 | 286 | 286 | 37 | 13 | 0 | 1992.6 | 2147 | 802 | 172 | 583 | 1130 | 98.1 |
| Pablo Arreyano | 2024-2027 | 10 | 16 | .385 | 4.16 | 102 | 19 | 1 | 0 | 1 | 209.7 | 213 | 97 | 13 | 50 | 95 | 13.3 |
| Rayman Arrezola | 2027-2027 | 1 | 0 | 1.000 | 9.00 | 1 | 0 | 0 | 0 | 0 | 2.0 | 2 | 2 | 0 | 2 | 2 | 0.0 |
| Robin Arriot | 2016-2017 | 1 | 5 | .167 | 6.34 | 8 | 8 | 0 | 0 | 0 | 44.0 | 48 | 31 | 7 | 27 | 13 | 0.0 |
| Angelo Arroyo | 2000-2005 | 53 | 30 | .639 | 3.65 | 163 | 114 | 4 | 3 | 9 | 796.3 | 762 | 323 | 54 | 242 | 909 | 44.5 |
| Wilfredo Arroyo | 2023-2029 | 124 | 60 | .674 | 2.88 | 241 | 241 | 34 | 16 | 0 | 1658.6 | 1560 | 530 | 108 | 288 | 879 | 138.5 |
| Bill Ashley | 2020-2020 | 1 | 1 | .500 | 5.00 | 4 | 4 | 0 | 0 | 0 | 27.0 | 31 | 15 | 2 | 14 | 5 | 0.3 |
| Ike Asimov | 2012-2023 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0.0 |
| Solo Atkins | 2026-2029 | 5 | 4 | .556 | 4.82 | 87 | 1 | 0 | 0 | 5 | 114.0 | 114 | 61 | 18 | 37 | 67 | 3.9 |
| Gary Audley | 2023-2029 | 51 | 73 | .411 | 4.58 | 234 | 161 | 14 | 5 | 0 | 1069.3 | 1117 | 544 | 119 | 326 | 603 | 30.9 |
| Donald Aunger | 2012-2015 | 13 | 24 | .351 | 5.20 | 53 | 51 | 2 | 1 | 0 | 289.0 | 296 | 167 | 46 | 117 | 142 | 2.9 |
| Jesus Aviles | 2003-2012 | 108 | 86 | .557 | 3.61 | 256 | 242 | 43 | 6 | 2 | 1789.6 | 1452 | 718 | 172 | 780 | 1505 | 75.9 |
| Albert Avina | 2005-2016 | 18 | 20 | .474 | 3.14 | 349 | 0 | 0 | 0 | 15 | 418.6 | 400 | 146 | 48 | 91 | 179 | 30.3 |
| George Aybar | 2006-2019 | 151 | 88 | .632 | 3.04 | 436 | 382 | 10 | 8 | 0 | 2359.3 | 2064 | 796 | 132 | 518 | 1302 | 148.8 |
| Alonso Azcarate | 2024-2025 | 6 | 7 | .462 | 5.63 | 125 | 0 | 0 | 0 | 2 | 140.7 | 167 | 88 | 18 | 76 | 40 | 2.3 |
| Zebulon Aziz | 2011-2020 | 19 | 35 | .352 | 3.96 | 142 | 60 | 2 | 1 | 3 | 456.3 | 481 | 201 | 47 | 109 | 149 | 23.3 |
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