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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WAR | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Roger Clemens* | 12.66 | 1992 | |
| 2 | Roger Clemens* | 12.10 | 1987 | |
| 3 | Gilberto Martínez# | 11.44 | 2029 | |
| 4 | Roger Clemens* | 11.21 | 1984 | |
| 5 | Roger Clemens* | 11.02 | 1986 | |
| 5 | Roger Clemens* | 11.02 | 1994 | |
| 7 | Archie Esparza# | 10.59 | 2027 | |
| 8 | Roger Clemens* | 10.58 | 1988 | |
| 9 | Roger Clemens* | 10.30 | 1990 | |
| 10 | Dwight Tucker | 10.29 | 2015 | |
| 11 | Dwight Tucker | 10.14 | 2014 | |
| 12 | Roger Clemens* | 10.11 | 1997 | |
| 13 | Gilberto Martínez# | 10.03 | 2027 | |
| 14 | Roger Clemens* | 9.61 | 1996 | |
| 15 | Bill Gill# | 9.58 | 2025 | |
| 16 | Bob Jenkins* | 9.48 | 2012 | |
| 17 | Mark Prior* | 9.37 | 2003 | |
| 17 | Mark Prior* | 9.37 | 2007 | |
| 19 | Ronald Moyer# | 9.32 | 2024 | |
| 20 | Mark Prior* | 9.26 | 2004 | |
| 21 | Roger Clemens* | 9.24 | 1985 | |
| 22 | Roger Clemens* | 9.22 | 2000 | |
| 23 | Zack Greinke* | 9.09 | 2009 | |
| 24 | Zack Greinke* | 9.02 | 2013 | |
| 25 | Roger Clemens* | 8.95 | 1989 | |
| 26 | Roger Clemens* | 8.80 | 1993 | |
| 27 | Dwight Tucker | 8.78 | 2018 | |
| 28 | Dwight Tucker | 8.75 | 2013 | |
| 29 | Madison Bumgarner | 8.57 | 2016 | |
| 30 | Zack Greinke* | 8.55 | 2011 | |
| 31 | Ian Richardson | 8.54 | 2014 | |
| 32 | Madison Bumgarner | 8.51 | 2019 | |
| 33 | Dwight Tucker | 8.46 | 2017 | |
| 34 | Zack Greinke* | 8.43 | 2008 | |
| 34 | Roger Clemens* | 8.43 | 1991 | |
| 36 | José Torres# | 8.40 | 2028 | |
| 37 | Joe Sparks | 8.35 | 2009 | |
| 38 | Rick Snow# | 8.31 | 2028 | |
| 39 | Zack Greinke* | 8.30 | 2014 | |
| 40 | Joe Sparks | 8.27 | 2012 | |
| 40 | Bob Jenkins* | 8.27 | 2014 | |
| 42 | Brandon Webb* | 8.25 | 2013 | |
| 43 | Ian Richardson | 8.24 | 2013 | |
| 44 | Eddie Morgan* | 8.20 | 2009 | |
| 45 | Bob Jenkins* | 8.18 | 2019 | |
| 46 | Dwight Tucker | 8.13 | 2016 | |
| 47 | Bob Jenkins* | 8.12 | 2020 | |
| 48 | Carl Pavano | 8.08 | 2008 | |
| 49 | Bill Gill# | 8.07 | 2026 | |
| 50 | Aaron Sele* | 8.05 | 2000 | |
| 50 | Juan Guzman* | 8.05 | 1994 | |
| 52 | Stephen Strasburg | 8.02 | 2014 | |
| 53 | Brandon Webb* | 7.99 | 2014 | |
| 54 | Zack Greinke* | 7.98 | 2012 | |
| 55 | Brandon Webb* | 7.91 | 2016 | |
| 56 | Kevin Schaefer | 7.90 | 2015 | |
| 57 | Archie Esparza# | 7.86 | 2028 | |
| 58 | Major Pixel | 7.80 | 2010 | |
| 59 | Stephen Strasburg | 7.79 | 2015 | |
| 60 | Mark Prior* | 7.72 | 2005 | |
| 61 | Bob Jenkins* | 7.65 | 2013 | |
| 61 | Roy Oswalt* | 7.65 | 2010 | |
| 61 | Nolan Arnold | 7.65 | 2015 | |
| 64 | Hideo Nomo | 7.62 | 1997 | |
| 65 | Ronald Moyer# | 7.59 | 2028 | |
| 66 | Jorge Enríquez# | 7.57 | 2027 | |
| 67 | Allen Bailey | 7.52 | 2017 | |
| 68 | Joe Sparks | 7.48 | 2011 | |
| 68 | Javier Vazquez* | 7.48 | 2001 | |
| 70 | Ronald Moyer# | 7.47 | 2026 | |
| 71 | Ronald Moyer# | 7.45 | 2029 | |
| 72 | Randy D Johnson | 7.44 | 1998 | |
| 73 | Gilberto Martínez# | 7.40 | 2028 | |
| 74 | Heath Bell | 7.39 | 2010 | |
| 75 | CC Sabathia* | 7.37 | 2006 | |
| 76 | Scott Kazmir | 7.34 | 2009 | |
| 77 | Roy Oswalt* | 7.33 | 2013 | |
| 77 | Eddie Morgan* | 7.33 | 2010 | |
| 77 | Jose Acevedo | 7.33 | 2007 | |
| 80 | Allen Bailey | 7.31 | 2015 | |
| 80 | Bill Gill# | 7.31 | 2024 | |
| 80 | José Torres# | 7.31 | 2030 | |
| 83 | Kerry Wood | 7.29 | 2006 | |
| 84 | Ismael Valdez* | 7.28 | 1996 | |
| 85 | Mark Prior* | 7.25 | 2006 | |
| 86 | Cole Hamels* | 7.23 | 2011 | |
| 87 | Roger Clemens* | 7.19 | 1999 | |
| 87 | Mark Prior* | 7.19 | 2002 | |
| 89 | Javier Vazquez* | 7.18 | 2002 | |
| 90 | Ismael Valdez* | 7.17 | 1997 | |
| 91 | Steve Nebraska | 7.15 | 2015 | |
| 92 | Lee Myers# | 7.12 | 2023 | |
| 92 | Bill Gill# | 7.12 | 2027 | |
| 94 | Archie Esparza# | 7.11 | 2026 | |
| 95 | Javier Vazquez* | 7.09 | 2005 | |
| 96 | Nolan Arnold | 7.07 | 2018 | |
| 96 | Nolan Arnold | 7.07 | 2014 | |
| 98 | Tony Martínez | 7.06 | 2007 | |
| 99 | Scott Sanders | 7.05 | 1996 | |
| 100 | Gary Lefebvre | 7.04 | 2013 |
