Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (BB/9)
Average
OBP
SLG
OPS
At Bats
Runs
Hits
Doubles
Triples
Homers
RBIs
Walks
Strikeouts
Stolen Bases
Caught Stealing
Sac Hits
Sac Fly
HBP
GIDP
D+/-
Wins
Losses
ERA
WHIP
Innings
Hits Allowed
HR Allowed
Walks (P)
Strikeouts (p)
Complete Games
Saves
Blown Saves
Shutouts
Quality Starts
Wild Pitches
Hit Batters
H/9
BB/9
SO/9
| 1. | DeLeon, Luis | (montgomerybrews) | Montgomery Brewsters | 0.2 |
| 2. | Swindell, Greg | (tbandit1) | NY Eagles | 0.3 |
| 3. | Sanders, Ben | (gt049) | San Francisco Gunslingers | 0.3 |
| 4. | Gregerson, Luke | Singapore Slingers | 0.3 | |
| 5. | Clarkson, John | (hankey23) | Highland Park Highlanders | 0.3 |
| 6. | Cummings, Candy | (Shpennymons) | Oyster Bay Eagles | 0.3 |
| 7. | Eckersley, Dennis | SoCal Uncensored | 0.3 | |
| 8. | Miller, Andrew | (sgt714) | Chicago Outfit | 0.3 |
| 9. | Rivera, Mariano | (gt049) | Fredricksburg Feds | 0.3 |
| 10. | Lynch, Jack | (dzach) | Ziegfeld Follies | 0.4 |
| 11. | Rivera, Mariano | (jaredhamann) | Big Inning Felines | 0.4 |
| 12. | Eckersley, Dennis | (michelb3514) | Iowa Corn Pickers | 0.4 |
| 13. | Eckersley, Dennis | (Consigliere33) | Kansas City Royals | 0.4 |
| 14. | Fisher, Cherokee | Akron Folks | 0.4 | |
| 15. | Saito, Takashi | (Pman) | CP Town United | 0.4 |
| 16. | Eckersley, Dennis | (Consigliere33) | California Angels | 0.4 |
| 17. | Spalding, Al | (Shpennymons) | Coco B-Wares | 0.4 |
| 18. | Griffith, Clark | (Gurg33) | Culver City Rabbits | 0.4 |
| 19. | Perez, Chris | (htennis) | Taylor Swift All Too Well | 0.4 |
| 20. | Spalding, Al | (Son_of_Soul) | Phoenix Homers | 0.4 |
| 21. | Fingers, Rollie | (gt049) | Chicago Blackhawks | 0.5 |
| 22. | Driscoll, Denny | (billyconn) | Zephyrhills wizards | 0.5 |
| 23. | Eckersley, Dennis | (WorcWarr) | Worcester Warriors | 0.5 |
| 24. | Hall, Dick | Alpine City Valley Boys | 0.5 | |
| 25. | Doolittle, Sean | New York Americans | 0.5 | |
| 26. | Betancourt, Rafael | (Gaberino) | Inland Empire Independents | 0.5 |
| 27. | Neshek, Pat | Poetic Force | 0.5 | |
| 28. | Darwin, Danny | (markphip) | Richmond Spiders | 0.5 |
| 29. | Doolittle, Sean | (joemcg) | OC Panthers | 0.5 |
| 30. | Hahn, Noodles | (Fungoking) | Uptown Pinstripes | 0.5 |
| 31. | Ward, John | (Shpennymons) | Patankin Peelers | 0.5 |
| 32. | Shaw, Jeff | (Cdubb7) | Shaler Stingers | 0.5 |
| 33. | Young, Cy | (CubanLou) | Miami Cubans | 0.5 |
| 34. | Owen, Frank | (tbcgagz) | Colorado Sky Soxx | 0.5 |
| 35. | Bradley, George | (CubanLou) | Miami Cubans | 0.5 |
| 36. | Cummings, Candy | (gibblets1973) | Grand Falls Grey Geese | 0.5 |
| 37. | Eckersley, Dennis | (bostontex24) | B-Town All-Stars | 0.5 |
| 38. | Otero, Dan | (Math5767) | Berlin Wolves | 0.5 |
| 39. | Eckersley, Dennis | Forest Lake Rangers | 0.5 | |
| 40. | Hughes, Tom | (mduse) | New York Mets | 0.5 |
| 41. | Eckersley, Dennis | (TramFan) | Sandusky County Blue Sots | 0.5 |
| 42. | Rivera, Mariano | Michigan Dirtbags | 0.5 | |
| 43. | Rudolph, Dick | (tbcgagz) | Colorado Sky Soxx | 0.5 |
| 44. | Rivera, Mariano | (filler) | North Dakota Blues | 0.5 |
| 45. | Eckersley, Dennis | McMillan Flow | 0.5 | |
| 46. | Eckersley, Dennis | (Horensky75) | Kenosha Kickers | 0.5 |
| 47. | Daily, Hugh | (JohnnyGotts) | Roanoke Renegades | 0.5 |
| 48. | Eckersley, Dennis | Seattle Sneezers | 0.5 | |
| 49. | Betancourt, Rafael | (owlshead) | Philadelphia U.S. Blues | 0.5 |
| 50. | Zettlein, George | (bfstevens) | Prairieland Bison | 0.6 |