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. | Raymond, Claude | Return of The Mack | 0.2 | |
| 2. | Howell, Harry | (abcjz) | Shreveport Stripes | 0.2 |
| 3. | Decatur, Art | (dynasty) | Louisville Lefties | 0.2 |
| 4. | Bleier, Richard | (alstro11) | Ridgefield Royals | 0.2 |
| 5. | Cummings, Candy | (boetto) | Marmion Fighting Monks | 0.2 |
| 6. | Lynch, Jack | (filler8) | Accentuating Positives | 0.2 |
| 7. | Betancourt, Rafael | (rreebe916) | Philly Elephants | 0.2 |
| 8. | Jones, Doug | Wisco Shepherds | 0.2 | |
| 9. | Maltzberger, Gordon | (filler8) | Julious Geezers | 0.3 |
| 10. | Swindell, Greg | (tbandit1) | NY Eagles | 0.3 |
| 11. | Betancourt, Rafael | (rreebe916) | Bird In Hand Mennonites🇺🇦 | 0.3 |
| 12. | Rivera, Mariano | (WorcWarr) | Worcester Warriors | 0.3 |
| 13. | Bleier, Richard | (Steezy) | Rocky Ford Raiders | 0.3 |
| 14. | Eckersley, Dennis | (Conniemack) | Chicago American-Giants | 0.3 |
| 15. | Devlin, Jim | (Shpennymons) | Mister B-Bobbin-Bears | 0.3 |
| 16. | Yellow Horse, Chief | (boetto) | St Francis Fighting Friars | 0.3 |
| 17. | Cummings, Candy | (Shpennymons) | Oyster Bay Eagles | 0.3 |
| 18. | Rivera, Mariano | (griffeyga) | Krazy Knuckleballers | 0.4 |
| 19. | Eckersley, Dennis | (michelb3514) | Iowa Corn Pickers | 0.4 |
| 20. | Eckersley, Dennis | (Consigliere33) | Kansas City Royals | 0.4 |
| 21. | Cummings, Candy | (idesofmarch) | Grey Eagles | 0.4 |
| 22. | Saito, Takashi | (filler) | Ladson Dodgers | 0.4 |
| 23. | Beck, Rod | (rreebe916) | Chicago Blackhawks🇺🇦 | 0.4 |
| 24. | Spalding, Al | (dynasty) | Cleveland Spiders | 0.4 |
| 25. | Eckersley, Dennis | (brawlers) | Texas Brawlers | 0.4 |
| 26. | Holland, Greg | (ScottCornelius) | London Yardbirds | 0.4 |
| 27. | Perez, Chris | Pittsburgh Black Sox | 0.4 | |
| 28. | Hendriks, Liam | (alphabravo) | Charlotte Clydesdales | 0.4 |
| 29. | Fingers, Rollie | CHICAGO BLACKHAWKS | 0.5 | |
| 30. | Schilling, Curt | (hayzess) | Panama RED | 0.5 |
| 31. | Napier, Buddy | (baseball4ever) | Casablanca Gamblers | 0.5 |
| 32. | Rhodes, Arthur | (Artinshki) | Base Ball Homers | 0.5 |
| 33. | Hall, Dick | (filler) | AL East All-Stars | 0.5 |
| 34. | Yates, Kirby | (liddlefeat) | Cleveland Eries | 0.5 |
| 35. | Betancourt, Rafael | (fps1956) | Inland Empire Independents | 0.5 |
| 36. | Devlin, Jim | (Fungoking) | Uptown Pinstripes | 0.5 |
| 37. | Brosnan, Jim | (tgbsbl1967) | Charlotte Bulldogs | 0.5 |
| 38. | Darwin, Danny | (cubsfan3) | Richmond Spiders | 0.5 |
| 39. | Smoltz, John | (WorcWarr) | Worcester Warriors | 0.5 |
| 40. | Powell, Jack | (DaveH) | Ladson Dodgers | 0.5 |
| 41. | Shaw, Jeff | (nickachap) | South Dakota Cavemen | 0.5 |
| 42. | Eckersley, Dennis | (rreebe916) | Turner Highlanders🇺🇦 | 0.5 |
| 43. | Gonzalez, Mike | (plpl512) | Montreal Monarchs | 0.5 |
| 44. | Seaver, Tom | (nycubsfan) | NY Rangers | 0.5 |
| 45. | Okajima, Hideki | (gibblets1973) | West End Wolves | 0.5 |
| 46. | Smith, Bob | (baseball4ever) | Public Enemy | 0.5 |
| 47. | Napier, Buddy | (honez) | Jersey City Giants | 0.5 |
| 48. | Doolittle, Sean | (chaaad) | Columbia Lions | 0.5 |
| 49. | Eckersley, Dennis | (Mitch44) | San Antonio Mustangs | 0.5 |
| 50. | Hughes, Tom | (hootjohnson) | Providence Steamrollers | 0.5 |