| Rank | Team | X Percentage | Record |
| 1. | Cincinnati Reds, 2010 | .8529 | 88-74 |
| 2. | Boston Red Sox, 2009 | .8325 | 105-57 |
| 3. | Cincinnati Reds, 2014 | .8265 | 92-70 |
| 4. | Boston Red Sox, 2011 | .8243 | 109-53 |
| 5. | Baltimore Orioles, 2013 | .8189 | 79-83 |
| 6. | Cincinnati Reds, 2011 | .8167 | 101-61 |
| 7. | Kansas City Royals, 1974 | .8159 | 84-78 |
| 8. | New York Mets, 2010 | .8152 | 98-64 |
| 9. | Milwaukee Brewers, 2011 | .8143 | 103-59 |
| 10. | Baltimore Orioles, 1966 | .8130 | 89-73 |
| 11. | New York Yankees, 2012 | .8115 | 98-64 |
| 12. | Baltimore Orioles, 1995 | .8104 | 89-73 |
| 13. | Chicago White Sox, 2007 | .8104 | 69-93 |
| 14. | Toronto Blue Jays, 2005 | .8098 | 91-71 |
| 15. | Boston Red Sox, 1947 | .8082 | 96-58 |
| 16. | Seattle Mariners, 2004 | .8067 | 95-67 |
| 17. | Boston Red Sox, 1978 | .8040 | 108-54 |
| 18. | Kansas City Royals, 1978 | .8003 | 88-74 |
| 19. | Kansas City Royals, 2012 | .7991 | 69-93 |
| 20. | New York Yankees, 2010 | .7982 | 105-57 |
| 21. | New York Mets, 2008 | .7981 | 99-63 |
| 22. | Detroit Tigers, 1984 | .7971 | 95-67 |
| 23. | Washington Nationals, 2012 | .7954 | 99-63 |
| 24. | Chicago Cubs, 1959 | .7951 | 102-52 |
| 25. | Boston Red Sox, 2007 | .7948 | 101-61 |
| 26. | Cincinnati Reds, 1974 | .7928 | 100-62 |
| 27. | Boston Red Sox, 2013 | .7925 | 101-61 |
| 28. | Boston Red Sox, 2014 | .7924 | 93-69 |
| 29. | Minnesota Twins, 2002 | .7923 | 92-70 |
| 30. | Toronto Blue Jays, 2006 | .7920 | 85-77 |
| 31. | Cincinnati Reds, 2013 | .7917 | 99-63 |
| 32. | Minnesota Twins, 2006 | .7904 | 90-74 |
| 33. | Cincinnati Reds, 2009 | .7898 | 92-70 |
| 34. | Boston Red Sox, 1977 | .7885 | 110-52 |
| 35. | Baltimore Orioles, 1973 | .7882 | 92-70 |
| 36. | Toronto Blue Jays, 1992 | .7877 | 94-68 |
| 37. | Baltimore Orioles, 2014 | .7872 | 72-90 |
| 38. | Oakland A's, 1990 | .7869 | 84-78 |
| 39. | Los Angeles Dodgers, 2002 | .7859 | 98-64 |
| 40. | Detroit Tigers, 2000 | .7859 | 84-78 |
| 41. | Texas Rangers, 2003 | .7858 | 57-105 |
| 42. | Baltimore Orioles, 2009 | .7856 | 94-68 |
| 43. | Cincinnati Reds, 1976 | .7856 | 113-49 |
| 44. | Los Angeles Dodgers, 1979 | .7856 | 82-80 |
| 45. | Oakland A's, 2003 | .7851 | 101-61 |
| 46. | Minnesota Twins, 2009 | .7851 | 108-54 |
| 47. | Toronto Blue Jays, 1985 | .7845 | 101-61 |
| 48. | Colorado Rockies, 2011 | .7845 | 84-78 |
| 49. | Kansas City Royals, 2011 | .7835 | 70-92 |
| 50. | Baltimore Orioles, 1992 | .7831 | 97-65 |