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 Wins Losses ERA WHIP Innings Hits Allowed HR Allowed Walks (P) Strikeouts (p) Complete Games Saves Blown Saves Shutouts Wild Pitches Hit Batters H/9 BB/9 SO/9

1.	Balfour, Grant	(doughboys)	Minneapolis Doughboys	0.00
2.	Britton, Zach	(skieff)	Hustons Mill YardHawks	0.00
3.	Buchter, Ryan	(ColinBoucher)	Alpha Bet City 🔤's	0.00
4.	Robertson, David	(Fireballers)	Destin Snowbirds	0.00
5.	Rivera, Mariano	(tjm)	Lake Mills Bulldogs	0.00
6.	Harris, Will		Sorrento Capras	0.14
7.	Miller, Andrew	(thestar789)	Niceville Fireballers	0.15
8.	Hand, Brad	(mattholland1975)	Bailey Mountaineers	0.15
9.	Boxberger, Brad	(Myunclepunk)	Everglades Feens	0.16
10.	Madson, Ryan	(baconfats)	Clubber Langs	0.16
11.	Saito, Takashi		Coeur d'Alene Trojans	0.16
12.	Jansen, Kenley		Montreal Bulldogs	0.18
13.	Lyons, Tyler	(mattholland1975)	Gorilla Harambe	0.18
14.	Boxberger, Brad	(thunderstruck)	Cape Cod MARINERS	0.20
15.	Carman, Don	(johnmardis)	Ottawa Otters	0.20
16.	Adams, Mike		Chicago Black Sox	0.21
17.	Feliz, Neftali	(Myunclepunk)	Everglades Feens	0.23
18.	Brewer, Jim		Virginia Rebels	0.23
19.	Strop, Pedro	(tribetime89)	Niceville Fireballers	0.24
20.	Rodriguez, Francisco	(vaughnk003)	Sparta Warriors	0.24
21.	Bush, Matt	(jaredhamann)	Almendares Scorpions	0.24
22.	Hall, Tom	(WillHaysnoe)	San Diego State Aztecs	0.24
23.	Howell, Jay	(Mike1670)	Portland Pork Chops	0.25
24.	Street, Huston	(vegasvman)	Bakersfield Bulldogs	0.25
25.	Marshall, Mike		Las Vegas Locusts	0.25
26.	Blanton, Joe	(Joemcg)	OC Hornets	0.26
27.	Street, Huston	(richgibson)	School Workers Organizers	0.26
28.	Wilhelm, Hoyt	(Crux)	Portland Trumpsters	0.27
29.	Adams, Mike	(gate-mouth)	Humbolt 💰⚾	0.28
30.	Marmol, Carlos	(alrosen)	CAPITOL HILL REDSKINS 55	0.28
31.	Pfiester, Jack		High Desert Drifters	0.28
32.	Sasaki, Kazuhiro		Barney Millers	0.28
33.	Wagner, Billy	(babyave1)	North Bridgton Fins	0.28
34.	Gossage, Rich	(dunroche)	Inland Empire 66ers	0.28
35.	Smith, Dave	(RoyHobbs)	Burlington Bees	0.29
36.	Benitez, Armando	(The_Natural)	Atlanta Chiefs	0.30
37.	Neshek, Pat	(joemcg)	OC Banditos	0.32
38.	Miller, Andrew	(UNHBombers)	Stowe UNH Bombers	0.33
39.	Uehara, Koji		Sweet Jane	0.34
40.	Edwards, Carl		Pittsburgh Pirates	0.34
41.	LaRoche, Dave	(ironhorse493)	New York Yankees	0.34
42.	Vizcaino, Arodys	(tribetime89)	Niceville Fireballers	0.34
43.	Kensing, Logan	(Cdubb7)	Picksburgh Pirates	0.36
44.	Hader, Josh	(chapman)	Jokes On You Fighting Clowns	0.36
45.	Miller, Andrew	(jallen)	Delta City Gamblers	0.36
46.	Drabowsky, Moe	(stengel28)	Williams Grove Racers	0.36
47.	Miller, Stu	(andyyoung)	New York Knights	0.37
48.	Jansen, Kenley		Sacramento Rivercats	0.37
49.	Jansen, Kenley		St. Louis Cardinals	0.37
50.	Hoffman, Trevor	(sheikyerboudi)	12th Man Trouble Makers	0.38