On-Base Percentage
All-Time Single-Season Z-Leaders
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Appearances
Ted Williams* (11)
1957 #9
1941 #10
1954 #14
1947 #19
1946 #39
1942 #48
1958 #61
1949 #79
1956 #80
1948 #84
1951 #87
Barry Bonds (9)
2004 #1
2002 #2
2003 #3
2001 #4
2007 #30
1992 #68
2006 #100
1993 #104
1996 #126
Babe Ruth* (8)
1920 #13
1923 #18
1926 #55
1921 #75
1930 #76
1931 #86
1924 #91
1932 #94
Wade Boggs* (6)
1988 #5
1985 #16
1986 #33
1987 #44
1983 #51
1989 #74
Frank Thomas (6)
1994 #15
1991 #29
1992 #41
1997 #56
1996 #89
1995 #98
Billy Hamilton* (5)
1894 #71
1898 #82
1895 #107
1893 #114
1891 #115
Dan Brouthers* (5)
1886 #103
1882 #125
1891 #129
1885 #145
1889 #150
Jason Giambi (4)
2001 #6
2000 #32
2005 #50
2002 #69
Mickey Mantle* (4)
1962 #11
1957 #17
1958 #111
1956 #138
Edgar Martinez* (4)
1995 #24
1997 #57
1996 #73
1999 #116
Ty Cobb* (4)
1910 #45
1915 #53
1916 #113
1913 #122
Ross Barnes* (3)
1876 #7
1873 #66
1872 #108
John McGraw* (3)
1899 #8
1900 #42
1898 #95
Rogers Hornsby* (3)
1924 #22
1928 #70
1925 #101
Manny Ramirez (3)
2002 #25
2000 #96
2006 #118
Rod Carew* (3)
1977 #43
1974 #63
1978 #131
Todd Helton (3)
2003 #54
2004 #62
2005 #102
Albert Pujols (3)
2008 #58
2009 #88
2003 #135
Tris Speaker* (3)
1916 #60
1920 #112
1912 #117
Rickey Henderson* (3)
1990 #72
1992 #90
1985 #120
Pete Browning (2)
1882 #12
1887 #124
George Brett* (2)
1980 #28
1985 #47
Jim Thome (2)
2002 #35
1996 #132
Cap Anson* (2)
1881 #37
1872 #105
Mark McGwire* (2)
1996 #59
1998 #64
Nap Lajoie* (2)
1910 #77
1904 #143
Eddie Collins* (2)
1915 #133
1914 #152
This chart lists the top 1% of all player-seasons.
Active players in bold, asterisk (*) means HOF.
See historical on-base percentage graph.
| Player | Year / Lg | OB% | Z-Score | |
|---|---|---|---|---|
| 1. | Barry Bonds | 2004 NL | .609 | 5.6181 |
| 2. | Barry Bonds | 2002 NL | .582 | 5.1282 |
| 3. | Barry Bonds | 2003 NL | .529 | 4.4117 |
| 4. | Barry Bonds | 2001 NL | .515 | 3.6693 |
| 5. | Wade Boggs* | 1988 AL | .476 | 3.6397 |
| 6. | Jason Giambi | 2001 AL | .477 | 3.5031 |
| 7. | Ross Barnes* | 1876 NL | .462 | 3.4907 |
| 8. | John McGraw* | 1899 NL | .547 | 3.4865 |
| 9. | Ted Williams* | 1957 AL | .526 | 3.4703 |
| 10. | Ted Williams* | 1941 AL | .553 | 3.4581 |
| 11. | Mickey Mantle* | 1962 AL | .486 | 3.3297 |
| 12. | Pete Browning | 1882 AA | .430 | 3.3269 |
| 13. | Babe Ruth* | 1920 AL | .533 | 3.3243 |
| 14. | Ted Williams* | 1954 AL | .513 | 3.2983 |
| 15. | Frank Thomas | 1994 AL | .487 | 3.2654 |
| 16. | Wade Boggs* | 1985 AL | .450 | 3.2504 |
| 17. | Mickey Mantle* | 1957 AL | .512 | 3.2488 |
| 18. | Babe Ruth* | 1923 AL | .545 | 3.2475 |
| 19. | Ted Williams* | 1947 AL | .499 | 3.2195 |
| 20. | Levi Meyerle | 1871 NA | .500 | 3.1670 |
| 21. | John Olerud* | 1993 AL | .473 | 3.1663 |
| 22. | Rogers Hornsby* | 1924 NL | .507 | 3.1660 |
| 23. | King Kelly* | 1886 NL | .483 | 3.1594 |
| 24. | Edgar Martinez* | 1995 AL | .479 | 3.1135 |
| 25. | Manny Ramirez | 2002 AL | .450 | 3.1134 |
| 26. | Miguel Cabrera | 2011 AL | .448 | 3.0767 |
| 27. | Jose Bautista | 2011 AL | .447 | 3.0688 |
| 28. | George Brett* | 1980 AL | .454 | 3.0552 |
| 29. | Frank Thomas | 1991 AL | .453 | 3.0551 |
| 30. | Barry Bonds | 2007 NL | .480 | 3.0549 |
| 31. | Joe Mauer | 2009 AL | .444 | 3.0455 |
| 32. | Jason Giambi | 2000 AL | .476 | 3.0200 |
| 33. | Wade Boggs* | 1986 AL | .453 | 3.0181 |
| 34. | Arky Vaughan* | 1935 NL | .491 | 3.0178 |
| 35. | Jim Thome | 2002 AL | .445 | 3.0057 |
| 36. | Chipper Jones | 2008 NL | .470 | 3.0025 |
| 37. | Cap Anson* | 1881 NL | .442 | 2.9886 |
| 38. | Norm Cash* | 1961 AL | .487 | 2.9882 |
| 39. | Ted Williams* | 1946 AL | .497 | 2.9807 |
| 40. | Fred Dunlap* | 1884 UA | .448 | 2.9707 |
| 41. | Frank Thomas | 1992 AL | .439 | 2.9625 |
| 42. | John McGraw* | 1900 NL | .505 | 2.9377 |
| 43. | Rod Carew* | 1977 AL | .449 | 2.9312 |
| 44. | Wade Boggs* | 1987 AL | .461 | 2.9266 |
| 45. | Ty Cobb* | 1910 AL | .456 | 2.9074 |
| 46. | Tip O'Neill | 1887 AA | .490 | 2.9024 |
| 47. | George Brett* | 1985 AL | .436 | 2.8960 |
| 48. | Ted Williams* | 1942 AL | .499 | 2.8873 |
| 49. | Carlos Delgado | 2000 AL | .470 | 2.8840 |
| 50. | Jason Giambi | 2005 AL | .440 | 2.8757 |
| 51. | Wade Boggs* | 1983 AL | .444 | 2.8687 |
| 52. | Roger Connor* | 1885 NL | .435 | 2.8641 |
| 53. | Ty Cobb* | 1915 AL | .486 | 2.8458 |
| 54. | Todd Helton | 2003 NL | .458 | 2.8395 |
| 55. | Babe Ruth* | 1926 AL | .516 | 2.8369 |
| 56. | Frank Thomas | 1997 AL | .456 | 2.8361 |
| 57. | Edgar Martinez* | 1997 AL | .456 | 2.8284 |
| 58. | Albert Pujols | 2008 NL | .462 | 2.8261 |
| 59. | Mark McGwire* | 1996 AL | .467 | 2.8257 |
| 60. | Tris Speaker* | 1916 AL | .470 | 2.8207 |
| 61. | Ted Williams* | 1958 AL | .458 | 2.8038 |
| 62. | Todd Helton | 2004 NL | .469 | 2.8015 |
| 63. | Rod Carew* | 1974 AL | .433 | 2.8013 |
| 64. | Mark McGwire* | 1998 NL | .470 | 2.7957 |
| 65. | Toby Harrah* | 1985 AL | .432 | 2.7843 |
| 66. | Ross Barnes* | 1873 NA | .456 | 2.7797 |
| 67. | Fred Carroll | 1889 NL | .486 | 2.7763 |
| 68. | Barry Bonds | 1992 NL | .456 | 2.7654 |
| 69. | Jason Giambi | 2002 AL | .435 | 2.7654 |
| 70. | Rogers Hornsby* | 1928 NL | .498 | 2.7615 |
| 71. | Billy Hamilton* | 1894 NL | .523 | 2.7565 |
| 72. | Rickey Henderson* | 1990 AL | .439 | 2.7555 |
| 73. | Edgar Martinez* | 1996 AL | .464 | 2.7506 |
| 74. | Wade Boggs* | 1989 AL | .430 | 2.7410 |
| 75. | Babe Ruth* | 1921 AL | .512 | 2.7241 |
| 76. | Babe Ruth* | 1930 AL | .493 | 2.7171 |
| 77. | Nap Lajoie* | 1910 AL | .445 | 2.7088 |
| 78. | Ed Delahanty* | 1895 NL | .500 | 2.7015 |
| 79. | Ted Williams* | 1949 AL | .490 | 2.6993 |
| 80. | Ted Williams* | 1956 AL | .479 | 2.6906 |
| 81. | Paul O'Neill* | 1994 AL | .460 | 2.6862 |
| 82. | Billy Hamilton* | 1898 NL | .480 | 2.6802 |
| 83. | Ken Singleton* | 1977 AL | .438 | 2.6777 |
| 84. | Ted Williams* | 1948 AL | .497 | 2.6746 |
| 85. | Milton Bradley | 2008 AL | .436 | 2.6728 |
| 86. | Babe Ruth* | 1931 AL | .495 | 2.6622 |
| 87. | Ted Williams* | 1951 AL | .464 | 2.6576 |
| 88. | Albert Pujols | 2009 NL | .443 | 2.6537 |
| 89. | Frank Thomas | 1996 AL | .459 | 2.6508 |
| 90. | Rickey Henderson* | 1992 AL | .426 | 2.6421 |
| 91. | Babe Ruth* | 1924 AL | .513 | 2.6268 |
| 92. | George Gore | 1880 NL | .399 | 2.6176 |
| 93. | David Ortiz | 2007 AL | .445 | 2.6166 |
| 94. | Babe Ruth* | 1932 AL | .489 | 2.6123 |
| 95. | John McGraw* | 1898 NL | .475 | 2.5979 |
| 96. | Manny Ramirez | 2000 AL | .457 | 2.5965 |
| 97. | Alvin Davis | 1989 AL | .424 | 2.5954 |
| 98. | Frank Thomas | 1995 AL | .454 | 2.5885 |
| 99. | Richie Ashburn* | 1955 NL | .449 | 2.5871 |
| 100. | Barry Bonds | 2006 NL | .454 | 2.5775 |
| 101. | Rogers Hornsby* | 1925 NL | .489 | 2.5726 |
| 102. | Todd Helton | 2005 NL | .445 | 2.5610 |
| 103. | Dan Brouthers* | 1886 NL | .445 | 2.5558 |
| 104. | Barry Bonds | 1993 NL | .458 | 2.5536 |
| 105. | Cap Anson* | 1872 NA | .455 | 2.5492 |
| 106. | Mike Hargrove* | 1981 AL | .424 | 2.5451 |
| 107. | Billy Hamilton* | 1895 NL | .490 | 2.5330 |
| 108. | Ross Barnes* | 1872 NA | .454 | 2.5325 |
| 109. | Gary Sheffield | 1996 NL | .465 | 2.5318 |
| 110. | Tony Phillips* | 1993 AL | .443 | 2.5186 |
| 111. | Mickey Mantle* | 1958 AL | .443 | 2.5144 |
| 112. | Tris Speaker* | 1920 AL | .483 | 2.5102 |
| 113. | Ty Cobb* | 1916 AL | .452 | 2.5065 |
| 114. | Billy Hamilton* | 1893 NL | .490 | 2.5015 |
| 115. | Billy Hamilton* | 1891 NL | .453 | 2.4827 |
| 116. | Edgar Martinez* | 1999 AL | .447 | 2.4802 |
| 117. | Tris Speaker* | 1912 AL | .464 | 2.4750 |
| 118. | Manny Ramirez | 2006 AL | .439 | 2.4748 |
| 119. | Brian Giles | 2002 NL | .450 | 2.4707 |
| 120. | Rickey Henderson* | 1985 AL | .419 | 2.4697 |
| 121. | Travis Hafner | 2006 AL | .439 | 2.4669 |
| 122. | Ty Cobb* | 1913 AL | .467 | 2.4652 |
| 123. | Joe Morgan* | 1975 NL | .466 | 2.4618 |
| 124. | Pete Browning | 1887 AA | .464 | 2.4604 |
| 125. | Dan Brouthers* | 1882 NL | .403 | 2.4563 |
| 126. | Barry Bonds | 1996 NL | .461 | 2.4538 |
| 127. | Jesse Burkett* | 1895 NL | .486 | 2.4535 |
| 128. | Bob Caruthers | 1887 AA | .463 | 2.4495 |
| 129. | Dan Brouthers* | 1891 AA | .471 | 2.4495 |
| 130. | Jack Clark* | 1987 NL | .459 | 2.4473 |
| 131. | Rod Carew* | 1978 AL | .411 | 2.4447 |
| 132. | Jim Thome | 1996 AL | .450 | 2.4430 |
| 133. | Eddie Collins* | 1915 AL | .460 | 2.4322 |
| 134. | Paul Molitor* | 1987 AL | .438 | 2.4307 |
| 135. | Albert Pujols | 2003 NL | .439 | 2.4275 |
| 136. | Lance Berkman | 2004 NL | .450 | 2.4268 |
| 137. | Willie Randolph* | 1980 AL | .427 | 2.4195 |
| 138. | Mickey Mantle* | 1956 AL | .464 | 2.4164 |
| 139. | Larry Walker* | 1997 NL | .452 | 2.4130 |
| 140. | Alex Rodriguez | 2005 AL | .421 | 2.4087 |
| 141. | George Wright* | 1871 NA | .453 | 2.4073 |
| 142. | Chuck Knoblauch* | 1996 AL | .448 | 2.4046 |
| 143. | Nap Lajoie* | 1904 AL | .413 | 2.4038 |
| 144. | Ed Swartwood | 1883 AA | .394 | 2.4028 |
| 145. | Dan Brouthers* | 1885 NL | .408 | 2.4027 |
| 146. | Ferris Fain | 1951 AL | .451 | 2.3993 |
| 147. | Joe Kelley* | 1894 NL | .502 | 2.3938 |
| 148. | Larry Walker* | 2001 NL | .449 | 2.3932 |
| 149. | Willie Randolph* | 1991 AL | .424 | 2.3927 |
| 150. | Dan Brouthers* | 1889 NL | .462 | 2.3919 |
| 151. | Tony Gwynn* | 1994 NL | .454 | 2.3870 |
| 152. | Eddie Collins* | 1914 AL | .452 | 2.3824 |