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.	Balfour, Grant	(Balling)	Phoenix Expos	0.00
2.	Robertson, David	(RanceRaptor)	Rockin' Robins	0.00
3.	Britton, Zach	(skieff)	Hustons Mill YardHawks	0.00
4.	Boxberger, Brad	(Myunclepunk)	Chicago Feens	0.16
5.	Madson, Ryan	(Zigwiggity)	Hand Me Downs	0.16
6.	Roebuck, Ed	(jpcortez)	Mid-Century Moderns	0.16
7.	Putz, J.J.	(kingstreet)	Singapore Slingers	0.17
8.	Adams, Mike	(dynasty)	Howell Pirates	0.21
9.	Broxton, Jonathan	(wadesayles)	Nebo Bluebirds	0.23
10.	Brewer, Jim	(Whiterats)	Butte Copper kings	0.23
11.	Boxberger, Brad	(dunroche)	Nevada Racin' Rebels	0.25
12.	Street, Huston	(Gaberino)	Death Valley Demons	0.26
13.	Wilhelm, Hoyt	(chasherm)	Fort Atkinson Blackhawks	0.27
14.	Adams, Mike	(sytsmab)	Floppy Pigeons	0.28
15.	Pfiester, Jack	(PARATROOPER22)	DALLAS DRIFTERS	0.28
16.	Marmol, Carlos	(richgibson)	Homestead STRIKERS	0.28
17.	Percival, Troy	(michelb3514)	Iowa Corn Pickers	0.28
18.	Kimbrel, Craig	(SinCityMarauder)	Washington DC Democrats	0.28
19.	Wagner, Billy	(babyave1)	North Bridgton Fins	0.28
20.	Gossage, Rich	(dunroche)	Inland Empire 66ers	0.28
21.	Putz, J.J.	(tbone34)	Atlanta Brick Squad	0.29
22.	Smith, Dave	(dbutts)	Burlington Bees	0.29
23.	Wagner, Billy	(RedNeck97)	Hidden Temple Ninjas	0.30
24.	Miller, Andrew	(UNHBombers)	Stowe Bombers	0.33
25.	McHugh, Collin	(Barefootstomp)	Appalachian Moonshiners	0.36
26.	Hader, Josh	(chapman)	Jokes On You Fighting Clowns	0.36
27.	Drabowsky, Moe	(Joeyd8807)	Williams Grove Racers	0.36
28.	Hoffman, Trevor	(filler)	TU CHHS 135	0.38
29.	Saito, Takashi	(super)	Fargo Freeze	0.37
30.	Gagne, Eric	(Zigwiggity)	Gas House Gorillas	0.37
31.	Edwards, Carl	(BigRedMachine90)	Beating My Snake	0.38
32.	Street, Huston	(FLORIDAJACK)	Healdsburg Hounds	0.38
33.	Adams, Mike	(Jokerman1031)	Milwaukee Muffdivers	0.39
34.	Benoit, Joaquin	(dunroche)	Cleveland Indians	0.40
35.	Street, Huston	(dunroche)	Boston Thunderbolts	0.40
36.	Grilli, Jason	(martiny1979)	Milwaukee Bulldogs	0.40
37.	Zimmerman, Jeff	(patdoug20)	Tokyo Shinobis	0.41
38.	Soriano, Rafael	(4bagger)	Sioux City Sons of Pitches	0.41
39.	Saito, Takashi	(Jeter0296)	Freehold Frogs	0.40
40.	Hughes, Tom	(littlereb)	Garner Gators	0.41
41.	Davis, Ron	(ranchdude)	St. Louis Browns	0.42
42.	Britton, Zach	(fatbat1318)	NOLA Pelicans	0.42
43.	Smith, Dave	(pittstain1)	Who's Your Daddy	0.42
44.	Saito, Takashi	(dcwabdi)	Junkyard Dogs	0.42
45.	Cormier, Rheal		West Texas Feral Hogs	0.43
46.	Saito, Takashi	(markphip)	Branch County Frogs	0.44
47.	Adams, Mike	(bigjoe52)	The Great Cornholios	0.44
48.	Foulke, Keith	(Bigjoe52)	B.C. Lions	0.44
49.	Edwards, Carl	(mikem1988)	Tatooine Ninjas	0.44
50.	Jansen, Kenley	(Kruppe)	Ridout Street Renegades	0.44