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.	Papelbon, Jonathan	(nycubsfan)	San Antonio Texans	0.00
2.	Street, Huston	(markfreid)	Uniondale Firebirds	0.00
3.	Roebuck, Ed	(jpcortez)	Mid-Century Moderns	0.16
4.	Putz, J.J.	(kingstreet)	Singapore Slingers	0.17
5.	Adams, Mike	(Sparky)	Orleans Olefarts	0.21
6.	Lancaster, Les	(Lostit)	Chicago's Lost Cubs 1	0.22
7.	Broxton, Jonathan	(dynasty)	Hawaii Eruptions	0.23
8.	Boxberger, Brad	(coachmcs)	Lewisberry Old Timers	0.25
9.	Howell, Harry	(Shpennymons)	Oyster Bay Eagles	0.26
10.	Percival, Troy	(michelb3514)	Iowa Corn Pickers	0.28
11.	Pfiester, Jack	(PARATROOPER22)	DALLAS DRIFTERS	0.28
12.	Kimbrel, Craig		Washington DC Democrats	0.28
13.	Putz, J.J.	(tbone34)	Atlanta Brick Squad	0.29
14.	Cooper, Mort	(dynasty)	Walsall Woodeagles	0.29
15.	Neris, Hector	(Keeteu)	Hanshin Tigers	0.29
16.	Wagner, Billy	(salukisam)	Q City Quake	0.30
17.	McHugh, Collin		Appalachian Moonshiners	0.36
18.	Hoffman, Trevor	(filler)	Mojave Desert Dead Possums	0.38
19.	Gagne, Eric	(rreebe916)	Gas House Gorillas	0.37
20.	Saito, Takashi	(super)	Fargo Freeze	0.37
21.	Adams, Mike	(rreebe916)	San Francisco Goats	0.39
22.	Street, Huston	(Mattattack38)	Boston Thunderbolts	0.40
23.	Zimmerman, Jeff	(filler)	Tokyo Shinobis	0.41
24.	Saito, Takashi		Junkyard Dogs	0.42
25.	Cormier, Rheal	(broles)	Toledo MudHens	0.43
26.	Saito, Takashi		PARIS COMMUNE	0.44
27.	Foulke, Keith	(Bigjoe52)	B.C. Lions	0.44
28.	Sutter, Bruce	(bmilliron)	Bz Bang Bang City Bomba's	0.43
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.	Charlton, Norm	(itchy008)	Captain Supemarket	0.47
33.	Hochevar, Luke	(Whg383)	Jacksonville Tricky Cats	0.47
34.	Kuo, Hong-Chih	(andyyoung)	Homestead Grays	0.47
35.	Chapman, Aroldis	(Sidneypointers)	Philo Dogs	0.47
36.	Hoffman, Trevor	(sgt714)	Boston Red Sox	0.47
37.	Percival, Troy	(BamaTrashman)	Chico’s Bail Bonds	0.48
38.	Betances, Dellin	(Gaberino)	Sierra Nevada Quicksilvers	0.48
39.	Smith, Lee	(filler)	Kentucky Colonels	0.48
40.	Papelbon, Jonathan	(filler)	Weesles Ripped My Flesh	0.48
41.	Miller, Andrew	(jamin)	Chester Springs Menjai	0.49
42.	Kuo, Hong-Chih	(Sabotage)	Chitown Sabotage	0.49
43.	Adams, Mike	(andyyoung)	Visalia Oaks	0.49
44.	Chapman, Aroldis	(dunroche)	Chicago Mighty Bulls	0.49
45.	Betancourt, Rafael	(rfb60609)	Ephrata Cloisterers	0.50
46.	Kelley, Shawn		Skowtown New Mascot	0.51
47.	Devine, Joey		Karma 🚆 Train	0.51
48.	Perkins, Glen	(MikeDrop0221)	Ramstein Flyers	0.51
49.	Betances, Dellin	(MikeDrop0221)	Lancaster Lefties	0.51
50.	Sutter, Bruce		Miami Cats	0.53