Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.

Single-Season Leaders (ERA)

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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.	Roebuck, Ed	(jpcortez)	Mid-Century Moderns	0.16
2.	Putz, J.J.	(kingstreet)	Singapore Slingers	0.17
3.	Adams, Mike		Howell Pirates	0.21
4.	Broxton, Jonathan	(dynasty)	Hawaii Eruptions	0.23
5.	Brewer, Jim		Butte Copper kings	0.23
6.	Boxberger, Brad	(coachmcs)	Lewisberry Old Timers	0.25
7.	Adams, Mike	(sytsmab)	Floppy Pigeons	0.28
8.	Percival, Troy	(michelb3514)	Iowa Corn Pickers	0.28
9.	Marmol, Carlos		Homestead STRIKERS	0.28
10.	Pfiester, Jack	(PARATROOPER22)	DALLAS DRIFTERS	0.28
11.	Kimbrel, Craig		Washington DC Democrats	0.28
12.	Putz, J.J.	(tbone34)	Atlanta Brick Squad	0.29
13.	Cooper, Mort	(filler)	Walsall Woodeagles	0.29
14.	Neris, Hector	(Keeteu)	Hanshin Tigers	0.29
15.	Wagner, Billy	(dynasty)	Hidden Temple Ninjas	0.30
16.	McHugh, Collin	(filler)	Appalachian Moonshiners	0.36
17.	Hoffman, Trevor	(sheikyerboudi)	Mojave Desert Dead Possums	0.38
18.	Saito, Takashi	(super)	Fargo Freeze	0.37
19.	Gagne, Eric	(etmurry)	Gas House Gorillas	0.37
20.	Adams, Mike	(andylin)	San Francisco Goats	0.39
21.	Benoit, Joaquin	(dunroche)	Cleveland Indians	0.40
22.	Street, Huston	(dunroche)	Boston Thunderbolts	0.40
23.	Zimmerman, Jeff	(filler)	Tokyo Shinobis	0.41
24.	Smith, Dave		Who's Your Daddy	0.42
25.	Saito, Takashi		Junkyard Dogs	0.42
26.	Cormier, Rheal	(JD1234)	Victoria Vipers	0.43
27.	Saito, Takashi		Branch County Frogs	0.44
28.	Foulke, Keith	(Bigjoe52)	B.C. Lions	0.44
29.	Adams, Mike	(bigjoe52)	The Great Cornholios	0.44
30.	Kimbrel, Craig		Boston Babies	0.45
31.	Miller, Andrew	(michelb3514)	Iowa Corn Pickers	0.46
32.	Kuo, Hong-Chih	(andyyoung)	Homestead Grays	0.47
33.	McMahon, Don	(Ivancool189)	Campbell City Demons	0.47
34.	Hochevar, Luke		Eastcoast Elephants	0.47
35.	Charlton, Norm	(itchy008)	Captain Supemarket	0.47
36.	Chapman, Aroldis	(Sidneypointers)	Philo Dogs	0.47
37.	Hoffman, Trevor	(sgt714)	Boston Americans	0.47
38.	Percival, Troy		Lake Jackson Jets	0.48
39.	Nelson, Gene	(dbutts)	New Orleans Sandwiches	0.48
40.	Smith, Lee	(EvvCat)	Kentucky Colonels	0.48
41.	Papelbon, Jonathan	(dynasty)	Weesles Ripped My Flesh	0.48
42.	Miller, Andrew	(jamin)	Chester Springs Menjai	0.49
43.	Britton, Zach	(Rusty57)	Panama city Sharks	0.49
44.	Adams, Mike	(andyyoung)	Visalia Oaks	0.49
45.	Chapman, Aroldis	(dunroche)	Chicago Mighty Bulls	0.49
46.	Kuo, Hong-Chih	(Sabotage)	Chitown Sabotage	0.49
47.	Betancourt, Rafael	(rfb60609)	Ephrata Cloisterers	0.50
48.	Papelbon, Jonathan	(Zigwiggity)	Sound of Revenge	0.50
49.	Greene, Shane	(Deebs23)	Cincinnati Bow Ties	0.51
50.	Devine, Joey	(davrogbro62)	Karma 🚆 Train	0.51