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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Andrelton Simmons# | 1.254 | 2020 | |
| 2 | Francisco Lindor# | 1.120 | 2020 | |
| 3 | Nick Ahmed# | 1.087 | 2020 | |
| 4 | Jose Iglesias# | 1.070 | 2020 | |
| 5 | Javier Baez# | 1.069 | 2020 | |
| 6 | Luis Guillorme# | 1.063 | 2020 | |
| 7 | Miguel Rojas# | 1.060 | 2020 | |
| 7 | Willy Adames# | 1.060 | 2020 | |
| 9 | Freddy Galvis# | 1.047 | 2020 | |
| 10 | Trevor Story# | 1.007 | 2020 | |
| 11 | Corey Seager# | 1.002 | 2020 | |
| 12 | Amed Rosario# | 1.001 | 2020 | |
| 13 | Marcus Semien# | 0.985 | 2020 | |
| 14 | Paul DeJong# | 0.978 | 2020 | |
| 15 | Ehire Adrianza# | 0.973 | 2020 | |
| 16 | Kevin Newman# | 0.971 | 2020 | |
| 17 | Luis Urias# | 0.968 | 2020 | |
| 18 | Xander Bogaerts# | 0.965 | 2020 | |
| 18 | Didi Gregorius# | 0.965 | 2020 | |
| 20 | Fernando Tatis Jr.# | 0.955 | 2020 | |
| 21 | Jon Berti# | 0.945 | 2020 | |
| 21 | Carlos Correa# | 0.945 | 2020 | |
| 23 | Trea Turner# | 0.937 | 2020 | |
| 23 | Tim Anderson# | 0.937 | 2020 | |
| 25 | Kevin Kramer# | 0.921 | 2020 |
