Tal como en el 2020, Unión San Felipe quiere sorprender en el ascenso. Este es el plantel que armó para la temporada 2021 de la Primera B.
Arquero
| # | Player | Club | Position | |||||
|---|---|---|---|---|---|---|---|---|
| 1 |   Lucas Giovini |  | Arquero | 0 | 4 | 0 | 2340 | 1 |
| 25 | Maximiliano Mori | | Arquero | 0 | 0 | 0 | 0 | 0 |
| 25 | Martín Ibacache | | Arquero | 0 | 0 | 0 | 270 | 0 |
| 27 | Nicolás Rodríguez | | Arquero | 0 | 1 | 0 | 0 | 0 |
Defensa
| # | Player | Club | Position | |||||
|---|---|---|---|---|---|---|---|---|
| 3 | José Vargas | | Defensa | 1 | 4 | 1 | 965 | 0 |
| 3 | Jesús Pino |  | Defensa | 0 | 5 | 0 | 1700 | 0 |
| 13 | Nicolás Díaz | | Defensa | 0 | 4 | 0 | 732 | 0 |
| 16 | Matías Silva | | Defensa | 1 | 1 | 0 | 2539 | 1 |
| 23 | Yerko González | | Defensa | 1 | 2 | 0 | 809 | 0 |
| 26 | Sebastián Toro | | Defensa | 0 | 0 | 0 | 61 | 0 |
| 28 | David Fernández | | Defensa | 0 | 1 | 0 | 691 | 0 |
| 41 | Francisco Salinas | | Defensa | 0 | 8 | 1 | 1699 | 0 |
Mediocampista
| # | Player | Club | Position | |||||
|---|---|---|---|---|---|---|---|---|
| 6 | Leandro Fioravanti | | Mediocampista | 0 | 5 | 0 | 1386 | 0 |
| 8 | Tomás Lanzini | | Mediocampista | 1 | 7 | 1 | 1853 | 0 |
| 8 | Juan Méndez |  | Mediocampista | 4 | 4 | 0 | 1133 | 0 |
| 10 | Ricardo Rosales |  | Mediocampista | 2 | 0 | 0 | 1226 | 0 |
| 10 | Hernán Fredes | | Mediocampista | 1 | 2 | 0 | 717 | 0 |
| 14 | Fernando Quiroz | | Mediocampista | 0 | 4 | 0 | 573 | 0 |
| 16 | Osvaldo Carrasco | | Mediocampista | 0 | 0 | 0 | 10 | 0 |
| 20 | Enzo Ormeño |  | Mediocampista | 0 | 2 | 0 | 1649 | 0 |
| 21 | Pablo Sanhueza |  | Mediocampista | 0 | 2 | 0 | 56 | 0 |
| 29 | Ariel Torrijos | | Mediocampista | 0 | 0 | 0 | 0 | 0 |
| 30 | Lucas Wilchez | | Mediocampista | 1 | 1 | 1 | 418 | 0 |
Delantero
| # | Player | Club | Position | |||||
|---|---|---|---|---|---|---|---|---|
| 7 | Julio Castro |  | Delantero | 6 | 3 | 0 | 1459 | 0 |
| 7 | Gonzalo Reyes |  | Delantero | 5 | 6 | 1 | 2137 | 0 |
| 9 | Daniel Opazo | | Delantero | 0 | 1 | 0 | 146 | 0 |
| 9 | David Llanos | | Delantero | 1 | 0 | 0 | 803 | 0 |
| 11 | Sebastián Romero | | Delantero | 0 | 0 | 0 | 752 | 0 |
| 11 | Bairo Riveros | | Delantero | 3 | 3 | 0 | 1144 | 0 |
| 11 | Alejandro Azócar |  | Delantero | 1 | 2 | 0 | 682 | 0 |
| 15 | Esteban Antilef | | Delantero | 0 | 0 | 0 | 90 | 0 |
| 19 | Ignacio Mesías | | Delantero | 4 | 3 | 0 | 967 | 0 |
| 32 | Bastián Muñoz | | Delantero | 0 | 0 | 0 | 0 | 0 |
