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. | Decatur, Art | (FFFFFFFFEO) | Baltimore Burners | 0.2 |
| 2. | Cummings, Candy | Freetowne FoX | 0.2 | |
| 3. | Lynch, Jack | (Nuroc) | Desert Ted's Ostrich Oasis | 0.2 |
| 4. | DeLeon, Luis | (montgomerybrews) | Montgomery Brewsters | 0.2 |
| 5. | Maltzberger, Gordon | South Dakota Wild West | 0.3 | |
| 6. | Swindell, Greg | (tbandit1) | NY Eagles | 0.3 |
| 7. | Sanders, Ben | (Bevofan2020) | Beaumont Golden Gators | 0.3 |
| 8. | Betancourt, Rafael | New York Americans | 0.3 | |
| 9. | Eckersley, Dennis | (ConnieMack) | Chicago American-Giants | 0.3 |
| 10. | Devlin, Jim | (Shpennymons) | Mister B-Bobbin-Bears | 0.3 |
| 11. | Cummings, Candy | (Shpennymons) | Oyster Bay Eagles | 0.3 |
| 12. | Clarkson, John | Highland Park Highlanders | 0.3 | |
| 13. | Eckersley, Dennis | (tgbbirch) | Fremont Tigers | 0.3 |
| 14. | Rivera, Mariano | (sytsmab) | Fredricksburg Feds | 0.3 |
| 15. | Lynch, Jack | (filler) | Ziegfeld Follies | 0.4 |
| 16. | Rivera, Mariano | (griffeyga) | Krazy Knuckleballers | 0.4 |
| 17. | Eckersley, Dennis | (michelb3514) | Iowa Corn Pickers | 0.4 |
| 18. | Eckersley, Dennis | (Consigliere33) | Kansas City Royals | 0.4 |
| 19. | Cummings, Candy | Auburn Boattails | 0.4 | |
| 20. | Saito, Takashi | (dynasty) | CP Town United | 0.4 |
| 21. | Eckersley, Dennis | (Consigliere33) | California Angels | 0.4 |
| 22. | Spalding, Al | (Shpennymons) | Coco B-Wares | 0.4 |
| 23. | Griffith, Clark | (Gurg33) | Culver City Rabbits | 0.4 |
| 24. | Eckersley, Dennis | (brawlers) | Texas Brawlers | 0.4 |
| 25. | Holland, Greg | (ScottCornelius) | London Yardbirds | 0.4 |
| 26. | Perez, Chris | (superheat) | Pittsburgh Black Sox | 0.4 |
| 27. | Spalding, Al | (trynottosuck) | Hood River Experiments | 0.4 |
| 28. | Fingers, Rollie | (gt049) | Chicago Blackhawks | 0.5 |
| 29. | Driscoll, Denny | (razaibi) | Antalya Cracker Jacks | 0.5 |
| 30. | Eckersley, Dennis | (WorcWarr) | Worcester Warriors | 0.5 |
| 31. | Napier, Buddy | (baseball4ever) | Casablanca Gamblers | 0.5 |
| 32. | Hall, Dick | (Bhgray) | Providence Grays | 0.5 |
| 33. | Doolittle, Sean | (tda81) | New York Americans | 0.5 |
| 34. | Yates, Kirby | (liddlefeat) | Cleveland Eries | 0.5 |
| 35. | Betancourt, Rafael | (Gaberino) | Inland Empire Independents | 0.5 |
| 36. | Brosnan, Jim | (tgbsbl1967) | Charlotte Bulldogs | 0.5 |
| 37. | Darwin, Danny | (chapman) | Richmond Spiders | 0.5 |
| 38. | Doolittle, Sean | (joemcg) | OC Panthers | 0.5 |
| 39. | Smoltz, John | (WorcWarr) | Worcester Warriors | 0.5 |
| 40. | Hahn, Noodles | (Fungoking) | Uptown Pinstripes | 0.5 |
| 41. | Ward, John | (Shpennymons) | Patankin Peelers | 0.5 |
| 42. | Shaw, Jeff | (acr0320) | Shaler Stingers | 0.5 |
| 43. | Powell, Jack | (robmb) | Elmwood Park Tigers | 0.5 |
| 44. | Gonzalez, Mike | (Hendu42) | Bartonsville Pumas | 0.5 |
| 45. | Owen, Frank | Phoenix Firebirds | 0.5 | |
| 46. | Okajima, Hideki | (gibblets1973) | West End Wolves | 0.5 |
| 47. | Napier, Buddy | (robmb) | Jersey City Giants | 0.5 |
| 48. | Bradley, George | Drunken Gamblers | 0.5 | |
| 49. | Eckersley, Dennis | (bostontex24) | B-Town All-Stars | 0.5 |
| 50. | Eckersley, Dennis | (Bsinco) | Forest Lake Rangers | 0.5 |