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.	Robertson, David	(SyndicateLG)	Rockin' Robins	0.00
2.	Balfour, Grant	(CoachJ)	Phoenix Expos	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.	Saito, Takashi	(championstyle)	Jakarta Colts	0.16
8.	Putz, J.J.	(kingstreet)	Singapore Slingers	0.17
9.	Boxberger, Brad	(thunderstruck)	Cape Cod MARINERS	0.20
10.	Adams, Mike	(vernorama)	Bakersfield Buckaroos	0.21
11.	Broxton, Jonathan	(strutter)	Baseball Furies	0.23
12.	Brewer, Jim	(mickey7)	Rebel Smile	0.23
13.	Boxberger, Brad	(dunroche)	Nevada Racin' Rebels	0.25
14.	Howell, Jay	(ehwhy)	Haifa Hawks	0.25
15.	Street, Huston	(kycatzrock)	Fort Carson Cavalry	0.25
16.	Street, Huston	(tgbbirch)	Quincy Frogs	0.26
17.	Wilhelm, Hoyt	(chasherm)	Fort Atkinson Blackhawks	0.27
18.	Adams, Mike	(gt049)	Chicago Blackhawks	0.28
19.	Pfiester, Jack	(PARATROOPER22)	DALLAS DRIFTERS	0.28
20.	Marmol, Carlos	(richgibson)	Camino Corto COMMUNEROS	0.28
21.	Wagner, Billy	(babyave1)	North Bridgton Fins	0.28
22.	Kimbrel, Craig	(patrickm)	McGwire Coles	0.28
23.	Gossage, Rich	(dunroche)	Inland Empire 66ers	0.28
24.	Putz, J.J.	(tbone34)	Atlanta Brick Squad	0.29
25.	Smith, Dave	(dbutts)	Burlington Bees	0.29
26.	Neshek, Pat	(joemcg)	OC Banditos	0.32
27.	Miller, Andrew	(UNHBombers)	Stowe Bombers	0.33
28.	LaRoche, Dave	(fitzdan)	Seattle Wrong Again	0.34
29.	Vizcaino, Arodys	(Raidergreg72)	Saint Charles RiverCats	0.34
30.	McHugh, Collin	(Barefootstomp)	Appalachian Moonshiners	0.36
31.	Kensing, Logan	(Cdubb7)	Picksburgh Pirates	0.36
32.	Hader, Josh	(chapman)	Jokes On You Fighting Clowns	0.36
33.	Drabowsky, Moe	(rfb60609)	Williams Grove Racers	0.36
34.	Miller, Stu	(andyyoung)	New York Knights	0.37
35.	Jansen, Kenley	(Zigwiggity)	Sacramento River Cats	0.37
36.	Hoffman, Trevor	(dynasty)	TU CHHS 135	0.38
37.	Saito, Takashi	(super)	Fargo Freeze	0.37
38.	Gagne, Eric	(Zigwiggity)	Gas House Gorillas	0.37
39.	Edwards, Carl	(BigRedMachine90)	Beating My Snake	0.38
40.	Chapman, Aroldis	(ColinBoucher)	Alpha Bet City 🔤's	0.39
41.	Street, Huston	(LDJS1947)	ST. LOUIS SPIRIT	0.38
42.	Jansen, Kenley	(ayj88)	Money Baggs	0.39
43.	Adams, Mike	(LDJS1947)	YPSILANTI YAKS	0.39
44.	Allen, Cody	(htennis)	John Gibson For the Vezina	0.39
45.	Benoit, Joaquin	(dunroche)	Cleveland Indians	0.40
46.	Grilli, Jason	(towjoc31)	Seattle Free Agent	0.40
47.	Street, Huston	(dunroche)	Boston Thunderbolts	0.40
48.	Jansen, Kenley	(SilverFox)	Lakeland Flying Tigers	0.41
49.	Soriano, Rafael	(thunderstruck)	Sioux City SONS OF PITCHES	0.41
50.	Zimmerman, Jeff	(filler)	Jersey Clubbers	0.41