| Rank | Team | X Percentage | Record |
| 1. | Atlanta Braves, 1979 | .5507 | 78-84 |
| 2. | Chicago White Sox, 1998 | .5521 | 69-93 |
| 3. | Chicago Cubs, 1972 | .5565 | 67-95 |
| 4. | San Francisco Giants, 1977 | .5733 | 69-93 |
| 5. | Seattle Mariners, 1981 | .5771 | 94-68 |
| 6. | Seattle Mariners, 1982 | .5779 | 69-93 |
| 7. | Philadelphia A's, 1942 | .5780 | 58-96 |
| 8. | Washington Nationals, 2006 | .5811 | 57-105 |
| 9. | Seattle Mariners, 1980 | .5818 | 66-96 |
| 10. | Boston Braves, 1952 | .5820 | 63-91 |
| 11. | Minnesota Twins, 1977 | .5821 | 68-94 |
| 12. | San Francisco Giants, 1976 | .5841 | 62-100 |
| 13. | Kansas City Royals, 1993 | .5868 | 65-97 |
| 14. | Washington Nationals, 2007 | .5876 | 48-114 |
| 15. | Kansas City Royals, 1969 | .5881 | 44-118 |
| 16. | Seattle Pilots, 1969 | .5886 | 52-110 |
| 17. | Montreal Expos, 1969 | .5887 | 49-113 |
| 18. | Pittsburgh Pirates, 1940 | .5893 | 53-101 |
| 19. | Toronto Blue Jays, 1977 | .5902 | 60-102 |
| 20. | Seattle Mariners, 1979 | .5919 | 68-94 |
| 21. | Minnesota Twins, 1963 | .5944 | 81-81 |
| 22. | Milwaukee Brewers, 1994 | .5952 | 60-102 |
| 23. | St. Louis Cardinals, 1956 | .5972 | 48-106 |
| 24. | Seattle Mariners, 1977 | .5986 | 52-110 |
| 25. | Seattle Mariners, 1988 | .5989 | 55-107 |
| 26. | Washington Nationals, 2009 | .5993 | 72-90 |
| 27. | St. Louis Cardinals, 1974 | .6019 | 82-80 |
| 28. | New York Mets, 1963 | .6021 | 54-108 |
| 29. | Milwaukee Braves, 1960 | .6029 | 75-79 |
| 30. | New York Yankees, 1975 | .6029 | 89-73 |
| 31. | Philadelphia A's, 1938 | .6033 | 64-90 |
| 32. | Kansas City Royals, 1992 | .6039 | 59-103 |
| 33. | Atlanta Braves, 1973 | .6050 | 59-103 |
| 34. | Boston Red Sox, 1935 | .6050 | 70-84 |
| 35. | Philadelphia A's, 1941 | .6066 | 86-68 |
| 36. | Philadelphia A's, 1936 | .6068 | 80-74 |
| 37. | Texas Rangers, 1992 | .6073 | 66-96 |
| 38. | St. Louis Cardinals, 1936 | .6074 | 57-97 |
| 39. | Pittsburgh Pirates, 1951 | .6075 | 73-81 |
| 40. | Kansas City Royals, 1989 | .6076 | 67-95 |
| 41. | St. Louis Browns, 1953 | .6077 | 56-98 |
| 42. | San Francisco Giants, 1979 | .6084 | 57-105 |
| 43. | Washington Nationals, 2010 | .6087 | 57-105 |
| 44. | Toronto Blue Jays, 2010 | .6089 | 53-109 |
| 45. | Detroit Tigers, 1941 | .6092 | 61-93 |
| 46. | Minnesota Twins, 1962 | .6093 | 61-101 |
| 47. | New York Yankees, 1945 | .6097 | 54-100 |
| 48. | Philadelphia A's, 1933 | .6098 | 79-75 |
| 49. | Chicago Cubs, 1981 | .6099 | 41-121 |
| 50. | Minnesota Twins, 1964 | .6112 | 78-84 |