All Time MLB Records	Single Season MLB Records
Career BA Leaders	Highest BA in a Season
Career Hits Leaders	Most Hits in a Season
Career HR Leaders	Most HRs in a Season
Career RBI Leaders	Most RBIs in a Season
Career Runs Leaders	Most Runs in a Season
Career SB Leaders	Most SBs in a Season
Career Wins Leaders	Most Saves in a Season
Career Saves Leaders	Most Strikeout in a Season
Career Strikeout Leaders	Lowest ERA in a Season
Career ERA Leaders

MLB Milestones
No Hitters and Perfect Games	500 Home Run Club
300 Wins Club	3000 Hits Club
3000 Strikeouts Club	Triple Crown Winners

Unless there is a change in baseball philosophy, the MLB record for most stolen bases in a single seaon is safe for awhile. Hugh Nicol's 138 SB's has stood pat for over 120 years.

Most Stolen Bases in a Single MLB Season
Rank	Player	Team	Stolen Bases	Year
1	Hugh Nicol	Cincinnati Red Stockings (AA)	138	1887
2	Rickey Henderson	Oakland Athletics	130	1982
3	Arlie Latham	St. Louis Browns (AA)	129	1887
4	Lou Brock	St. Louis Cardinals	118	1974
5	Charlie Comiskey	St. Louis Browns (AA)	117	1887
T6	Billy Hamilton	Kansas City Cowboys (AA)	111	1889
T6	Billy Hamilton	Philadelphia Phillies	111	1891
T6	John Ward	New York Giants	111	1887
9	Vince Coleman	St. Louis Cardinals	110	1985
T10	Vince Coleman	St. Louis Cardinals	109	1987
T10	Arlie Latham	St. Louis Browns (AA)	109	1888
12	Rickey Henderson	Oakland Athletics	108	1983
13	Vince Coleman	St. Louis Cardinals	107	1986
14	Tom Brown	Boston Reds (AA)	106	1891
15	Maury Wills	Los Angeles Dodgers	104	1962
T16	Pete Browning	Louisville Colonels (AA)	103	1887
T16	Hugh Nicol	Cincinnati Red Stockings (AA)	103	1888
T18	Jim Fogarty	Philadelphia Phillies	102	1887
T18	Billy Hamilton	Philadelphia Phillies	102	1890
20	Rickey Henderson	Oakland Athletics	100	1980
21	Jim Fogarty	Philadelphia Phillies	99	1889
22	Billy Hamilton	Philadelphia Phillies	98	1894
T23	Billy Hamilton	Philadelphia Phillies	97	1895
T23	Ron LeFlore	Montreal Expos	97	1980
T23	Harry Stovey	Boston Reds (PL)	97	1890
T26	Ty Cobb	Detroit Tigers	96	1915
T26	Omar Moreno	Pittsburgh Pirates	96	1980
T28	Bid McPhee	Cincinnati Red Stockings (AA)	95	1887
T28	Curt Welch	Philadelphia Athletics (AA)	95	1888
T30	Mike Griffin	Baltimore Orioles (AA)	94	1887
T30	Maury Wills	Los Angeles Dodgers	94	1965
T32	Rickey Henderson	New York Yankees	93	1988
T32	Tommy McCarthy	St. Louis Browns (AA)	93	1888
34	Darby O'Brien	Brooklyn Bridegrooms	91	1889
35	Tim Raines	Montreal Expos	90	1983
T36	Herman Long	Kansas City Cowboys (AA)	89	1889
T36	Curt Welch	St. Louis Browns (AA)	89	1887
T38	Clyde Milan	Washington Senators	88	1912
T38	Tom Poorman	Philadelphia Athletics (AA)	88	1887
T38	Blondie Purcell	Baltimore Orioles (AA)	88	1887
T38	John Ward	Brooklyn Grooms	88	1892
T42	Rickey Henderson	New York Yankees	87	1986
T42	Joe Kelley	Baltimore Orioles	87	1896
T42	Arlie Latham	Cincinnati Reds	87	1891
T42	Harry Stovey	Philadelphia Athletics (AA)	87	1888
46	Cub Stricker	Cleveland Blues (AA)	86	1887
T47	Hub Collins	Brooklyn Bridegrooms	85	1890
T47	Hugh Duffy	Boston Reds (AA)	85	1891
T47	Tommy Tucker	Baltimore Orioles (AA)	85	1887

AA - American Association
PL - Players League

Sources:
baseball-reference.com
baseball-almanac.com
wikipedia.org
thebaseballcube.com