Update: Here's where we stand with the records now, with contributions from the progs listed below. If you know of any player who's broken one of these records, please share!
Jimmy Carter League (1980-2016)
100 Year War (1901-1973)
No Whining Progressive (1961-2024)
Ted Lasso (regressive) (2019-2002)
NWP-RE (1901-1927)
ATP (1885-1979, although records only back to 1891)
Real Life Progressive
Early Century Icon League
WITWD (1985-2024)
WITWD PART 2 (1969-1989)
POST WAR (1946-2016)
Golden Age Progressive (1920 - 1996 currently)
Golden Age 2 Progressive (1920 - 1952 currently)
OG's Regressive (1998 - 1913 currently)
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PITCHING
SINGLE-SEASON
WINS -- 51, 1912 Walter Johnson
LOSSES -- 64, 1901 Jack Taylor
SHUTOUTS -- 13, 1892 Bill Hutchison and 1917 Pete Alexander
SAVES -- 62, 1907 Mordecai Brown; 1927 Jumbo Elliott; 1917 Marv Goodwin
INNINGS -- 717.2, 1892 Bill Hutchison
STRIKEOUTS -- 504, 1973 Nolan Ryan
ERA -- 1.11, 2015 Jake Arrieta
CAREER
WINS -- 543, Warren Spahn
LOSSES -- 318, Steve Carlton
SHUTOUTS -- 50, Christy Mathewson
SAVES -- 549, Hoyt Wilhem
INNINGS --6495.2, Nolan Ryan
STRIKEOUTS -- 7072, Nolan Ryan
ERA -- 2.40, Ed Walsh
HITTING
SINGLE SEASON
HITS -- 349, 1894 Hugh Duffy
DOUBLES -- 111, 1894 Hugh Duffy
TRIPLES -- 62, 1893 Perry Werden
HOME RUNS -- 93, 1927 Babe Ruth
RUNS -- 278, 1894 Hugh Duffy
RBI -- 304, 1922 Rogers Hornsby
STOLEN BASES -- 175, 1987 Vince Coleman
AVG -- .476, 1925 Harry Heilmann
OBP -- .631, 1923 Babe Ruth
SLG -- .965, 1920 Babe Ruth
OPS -- 1.539, 1923 Babe Ruth
HITTING STREAK -- 85, 1894 Hugh Duffy
CAREER
HITS -- 5133, Ty Cobb
DOUBLES -- 1048, Tris Speaker
TRIPLES -- 246, Ty Cobb
HOME RUNS -- 921, Babe Ruth
RUNS -- 3135, Barry Bonds
RBI -- 3279, Hank Aaron
STOLEN BASES -- 1666, Rickey Henderson
AVG -- .393, Rogers Hornsby
OBP -- .500, Ted Williams; Babe Ruth
SLG -- .750, Babe Ruth
OPS -- 1.250, Babe Ruth
7/8/2025 2:38 AM (edited)