San Marcos de Arica reaparece en la Primera B del fútbol chileno. Este es el plantel con el que competirá durante el 2020.
Plantel San Marcos de Arica 2020
| # | Player | Club | Position | |||||
|---|---|---|---|---|---|---|---|---|
| 1 |  Nery Veloso |  | Arquero | 0 | 0 | 0 | 540 | 0 |
| 2 | Nicolás Bascuñán | | Mediocampista | 0 | 0 | 0 | 0 | 0 |
| 3 | Ignacio Meza | | Defensa | 3 | 1 | 1 | 2430 | 0 |
| 5 |  Robert González | | Defensa | 1 | 4 | 0 | 2340 | 0 |
| 6 | Alan Fernández | | Defensa | 0 | 0 | 0 | 1 | 0 |
| 7 | Bairon Monroy | | Delantero | 5 | 4 | 1 | 1732 | 0 |
| 8 | Jorge Faúndez | | Mediocampista | 0 | 5 | 0 | 1088 | 0 |
| 9 | Nicolás Millán | | Delantero | 0 | 3 | 0 | 1241 | 0 |
| 10 | Renato González | | Mediocampista | 1 | 1 | 0 | 1737 | 0 |
| 14 | Ignacio Avilés | | Mediocampista | 0 | 8 | 1 | 1583 | 0 |
| 14 | José Aguilera | | Mediocampista | 1 | 1 | 0 | 486 | 0 |
| 14 | Cristóbal Guerra | | Mediocampista | 1 | 2 | 0 | 1547 | 0 |
| 15 | Gonzalo Medina | | Defensa | 0 | 0 | 0 | 77 | 0 |
| 15 | Brandon Muñoz | | Mediocampista | 0 | 0 | 0 | 0 | 0 |
| 15 | Cristian Barrientos | | Delantero | 0 | 0 | 0 | 20 | 0 |
| 16 | Lucas Benavides | | Delantero | 0 | 0 | 0 | 37 | 0 |
| 17 | Bernardo Mendoza | | Defensa | 0 | 3 | 1 | 743 | 0 |
| 17 | Korben Rojas | | Defensa | 0 | 3 | 0 | 1538 | 0 |
| 19 | Agustín Navarro | | Delantero | 0 | 0 | 0 | 435 | 0 |
| 20 | Matías Ávila | | Mediocampista | 0 | 0 | 0 | 0 | 0 |
| 20 |  Diego Celis | | Delantero | 1 | 6 | 1 | 439 | 0 |
| 21 | Brayan Manosalva | | Arquero | 0 | 1 | 0 | 1980 | 0 |
| 21 | Jorge Pereyra | | Delantero | 2 | 0 | 0 | 398 | 0 |
| 22 | Benjamín Tapia | | Arquero | 0 | 0 | 0 | 0 | 0 |
| 22 | Nahuel Donadell | | Mediocampista, Delantero | 4 | 0 | 0 | 730 | 0 |
| 22 | Fernando Isla | | Delantero | 0 | 0 | 0 | 613 | 0 |
| 23 | Ramón Sáez | | Defensa | 0 | 0 | 0 | 0 | 0 |
| 23 | Mauricio Godoy | | Delantero | 3 | 1 | 0 | 973 | 0 |
| 24 | Cristóbal Kalise | | Defensa | 0 | 4 | 0 | 962 | 0 |
| 25 | Brian Torres | | Mediocampista | 0 | 0 | 0 | 0 | 0 |
| 27 | Kevin Baeza | | Delantero | 1 | 0 | 0 | 189 | 0 |
| 28 | Ignacio Silva | | Arquero | 0 | 0 | 0 | 0 | 0 |
| 28 | Eduardo Vilches | | Mediocampista | 1 | 5 | 0 | 2359 | 1 |
| 29 | Federico Millacet | | Delantero | 2 | 1 | 0 | 1524 | 0 |
