Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (Strikeouts)
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. | Hader, Josh | (bigalroulo) | West Michigan Whitecaps | 373 |
| 2. | Kluber, Corey | (Mowolfon) | Bensonhurst Cyclones | 372 |
| 3. | Kluber, Corey | (YNKEESRule) | Shotton Axemen | 360 |
| 4. | Scherzer, Max | (Strokey) | Brookfield Gorillas | 350 |
| 5. | Scherzer, Max | (SilverFox) | Michigan Battle Cats | 350 |
| 6. | Scherzer, Max | (ETMusic) | Brisbane D-Fence | 350 |
| 7. | Verlander, Justin | (malael) | New York Highlanders | 348 |
| 8. | Scherzer, Max | (gibblets1973) | Los Gibbletos 11leven | 347 |
| 9. | Scherzer, Max | (mickey7) | New York Hammers | 347 |
| 10. | Corbin, Patrick | (me) | Bartonsville Pumas | 347 |
| 11. | deGrom, Jacob | (power) | Indianapolis Crusaders | 347 |
| 12. | deGrom, Jacob | (ColinBoucher) | Sycamore Street MollyWhoppers | 347 |
| 13. | Scherzer, Max | (LukeWancewicz21) | Oakland A's | 346 |
| 14. | Kluber, Corey | (mattholland1975) | Durango Drunk Cowboys | 346 |
| 15. | Scherzer, Max | (power) | Yazoo Badonkadonks | 346 |
| 16. | Verlander, Justin | Los Angeles Cows | 346 | |
| 17. | Sale, Chris | (Raidergreg72) | Saint Charles RiverCats | 345 |
| 18. | Sale, Chris | (Bigredmachine90) | Barboursville Bacon | 345 |
| 19. | Scherzer, Max | (hamburglar) | Aro's Laugh | 343 |
| 20. | Kluber, Corey | (JoeyT2870) | Seabrook Dirty Theives | 343 |
| 21. | Kluber, Corey | (YNKEESRule) | Shotton Axemen | 343 |
| 22. | Scherzer, Max | (cwepner39) | Towson Generals | 343 |
| 23. | Kershaw, Clayton | (Trulaia) | Scranton Ducks | 342 |
| 24. | Sale, Chris | (Bluesig) | Buñawan Bald Eagles | 342 |
| 25. | Scherzer, Max | (Consigliere33) | Chicago Cubs | 342 |
| 26. | Sale, Chris | (ILO-STL) | Quincy X-Cords | 342 |
| 27. | Scherzer, Max | (maharacer) | New Haven Ravens | 341 |
| 28. | deGrom, Jacob | (htennis) | What If I Never Get Over You | 341 |
| 29. | Sale, Chris | (kaline6) | Alabama Angry Birds | 340 |
| 30. | Kluber, Corey | (johnjohnson22) | Bow Tie Village Ball Talk | 340 |
| 31. | Kluber, Corey | (Mowolfon) | Bensonhurst Cyclones | 340 |
| 32. | Scherzer, Max | (jim2miller) | Northern Ohio Nighthawks | 339 |
| 33. | Scherzer, Max | (ac31) | Balllcity Blue Jays | 339 |
| 34. | Cole, Gerrit | (htennis) | The 100 Bellarkes | 338 |
| 35. | Scherzer, Max | (Erwin23) | Indiana Cavemen | 338 |
| 36. | Scherzer, Max | (JPThaRipper) | Bowie Blue Birds | 338 |
| 37. | Kluber, Corey | (silvereaglemyst) | Bronx Robins | 338 |
| 38. | Scherzer, Max | (michelb3514) | Iowa Corn Pickers | 337 |
| 39. | Scherzer, Max | (michelb3514) | Iowa Corn Pickers | 337 |
| 40. | Sale, Chris | (mattholland1975) | Portland Punishers | 337 |
| 41. | Sale, Chris | Nkosi Hive | 337 | |
| 42. | Kershaw, Clayton | (jhong78) | Stark City Iron Men | 336 |
| 43. | Scherzer, Max | (Coach229) | Utica Post 229 | 336 |
| 44. | Verlander, Justin | (ar2344) | St. Peter Saints | 336 |
| 45. | Verlander, Justin | (nathaniel20) | Alcoa Patriots 1-16⚾️ | 336 |
| 46. | Scherzer, Max | (paranoid) | Las Vegas Chaos II | 336 |
| 47. | Scherzer, Max | (topps) | Chicago Cub | 336 |
| 48. | Kluber, Corey | (ColinBoucher) | Derelict Winos | 336 |
| 49. | Scherzer, Max | (tda81) | Dome Pieces | 335 |
| 50. | Kluber, Corey | (Coutinho11) | Lincoln Red Stripes | 335 |