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 | (dcwabdi) | 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 | (michelb3514) | Marmion Fighting Monks | 0.2 |
| 6. | Lynch, Jack | (filler8) | Accentuating Positives | 0.2 |
| 7. | Betancourt, Rafael | (rreebe916) | Philly Elephants | 0.2 |
| 8. | Jones, Doug | (ironwill1) | Wisco Fluffy Tails | 0.2 |
| 9. | Maltzberger, Gordon | (filler8) | Julious Geezers | 0.3 |
| 10. | Rivera, Mariano | (WorcWarr) | Worcester Warriors | 0.3 |
| 11. | Betancourt, Rafael | (thadjhall) | Manhattan Darts 30 | 0.3 |
| 12. | Bleier, Richard | (Steezy) | Rocky Ford Raiders | 0.3 |
| 13. | Eckersley, Dennis | (Conniemack) | Chicago American-Giants | 0.3 |
| 14. | Devlin, Jim | (Shpennymons) | Mister B-Bobbin-Bears | 0.3 |
| 15. | Yellow Horse, Chief | (boetto) | St Francis Fighting Friars | 0.3 |
| 16. | Cummings, Candy | (Shpennymons) | Oyster Bay Eagles | 0.3 |
| 17. | Rivera, Mariano | (griffeyga) | Krazy Knuckleballers | 0.4 |
| 18. | Eckersley, Dennis | (michelb3514) | Iowa Corn Pickers | 0.4 |
| 19. | Eckersley, Dennis | (Consigliere33) | Kansas City Royals | 0.4 |
| 20. | Cummings, Candy | (mrbubbles1967) | Hooverville Hackers | 0.4 |
| 21. | Saito, Takashi | Ladson Dodgers | 0.4 | |
| 22. | Beck, Rod | (rreebe916) | Chicago Blackhawks🇺🇦 | 0.4 |
| 23. | Spalding, Al | Cleveland Spiders | 0.4 | |
| 24. | Eckersley, Dennis | (brawlers) | Texas Brawlers | 0.4 |
| 25. | Holland, Greg | (ScottCornelius) | London Yardbirds | 0.4 |
| 26. | Perez, Chris | (wmckee) | Arkansas Travelers | 0.4 |
| 27. | Hendriks, Liam | (alphabravo) | Charlotte Clydesdales | 0.4 |
| 28. | Fingers, Rollie | (vonveezil) | CHICAGO BLACKHAWKS | 0.5 |
| 29. | Schilling, Curt | (hayzess) | Panama RED | 0.5 |
| 30. | Napier, Buddy | (baseball4ever) | Casablanca Gamblers | 0.5 |
| 31. | Hall, Dick | (filler) | AL East All-Stars | 0.5 |
| 32. | Rhodes, Arthur | (Artinshki) | Base Ball Homers | 0.5 |
| 33. | Betancourt, Rafael | (fps1956) | Inland Empire Independents | 0.5 |
| 34. | Yates, Kirby | (liddlefeat) | Cleveland Eries | 0.5 |
| 35. | Devlin, Jim | (Fungoking) | Uptown Pinstripes | 0.5 |
| 36. | Brosnan, Jim | (tgbsbl1967) | Charlotte Bulldogs | 0.5 |
| 37. | Darwin, Danny | (Grw3) | Sims Spiders | 0.5 |
| 38. | Smoltz, John | (WorcWarr) | Worcester Warriors | 0.5 |
| 39. | Powell, Jack | (DaveH) | Ladson Dodgers | 0.5 |
| 40. | Shaw, Jeff | (tda81) | South Dakota Cavemen | 0.5 |
| 41. | Eckersley, Dennis | (rreebe916) | Turner Highlanders🇺🇦 | 0.5 |
| 42. | Gonzalez, Mike | (Wymeadow) | Montreal Monarchs | 0.5 |
| 43. | Seaver, Tom | (nycubsfan) | NY Rangers | 0.5 |
| 44. | Okajima, Hideki | (gibblets1973) | West End Wolves | 0.5 |
| 45. | Smith, Bob | (baseball4ever) | Public Enemy | 0.5 |
| 46. | Napier, Buddy | (Yoda) | Jersey City Giants | 0.5 |
| 47. | Doolittle, Sean | (chaaad) | Columbia Lions | 0.5 |
| 48. | Eckersley, Dennis | (Mitch44) | San Antonio Mustangs | 0.5 |
| 49. | Caruthers, Bob | (fuzzbox13) | Wallington Yankees | 0.5 |
| 50. | Hughes, Tom | Providence Steamrollers | 0.5 |