Team W-L Histories: 1901-2009

In the course of preparing the three preceding posts, I compiled the table below. Note that the American League's overall record is slightly better than the National League's. That's because of the AL's edge in interleague play, which continues into 2010.

Won-Lost records, 1901-2009
(franchise histories at bottom of table)
National League
Team	Games	Won	Lost	W-L%
Giants	16994	9070	7834	.537
Dodgers	16995	8841	8065	.523
Cardinals	17006	8774	8128	.519
Pirates	16993	8607	8292	.509
Cubs	17012	8545	8367	.505
Reds	17010	8484	8436	.501
Diamondbacks	1944	970	974	.499
Astros	7652	3812	3835	.498
Braves	16983	8168	8708	.484
Mets	7644	3655	3981	.479
Marlins	2686	1283	1403	.478
Nationals	6511	3098	3409	.476
Rockies	2692	1281	1411	.476
Phillies	16955	7830	9051	.464
Padres	6518	3008	3508	.462
Brewers	1943	889	1053	.458
NL totals	173538	86315	86455	.4996
American League
Team	Games	Won	Lost	W-L%
Yankees	16962	9575	7294	.568
Red Sox	16973	8730	8160	.517
Indians	16987	8622	8274	.510
Tigers	17013	8564	8356	.506
White Sox	16982	8540	8339	.506
Angels	7811	3887	3921	.498
Blue Jays	5224	2589	2632	.496
Athletics	16947	8189	8671	.486
Royals	6505	3143	3360	.483
Twins	16995	8138	8748	.482
Brewers	4570	2200	2367	.482
Orioles	16986	8013	8863	.475
Mariners	5223	2461	2760	.471
Rangers	7797	3657	4134	.469
Rays	1941	826	1115	.426
AL totals	174916	87134	86994	.5004
Franchise histories:
National League
Giants in San Francisco, 1985- ; in New York (also as Gothams), 1883-1957
Dodgers in Los Angeles, 1958 - ; in Brooklyn (also as Robins, Bridegrooms, Grooms), 1890-1957); previously in American Association (as Bridegrooms, Grays, Atlantics), 1884-1889
Cardinals in St. Louis (also as Perfectos, Browns), 1892- ; previously in American Association (as Browns, Brown Stockings), 1882-1891
Pirates in Pittsburgh (also as Alleghenys), 1887- ; previously in American Association (as Alleghenys), 1882-1886
Cubs in Chicago (also as Orphans, Colts, White Stockings), 1876-
Reds in Cincinnati (also as Redlegs), 1890- ; previously in American Association (as Red Stockings), 1882-1889
Diamondbacks in Arizona (Phoenix), 1998-
Astros in Houston (also as Colt .45's), 1962-
Braves in Atlanta, 1966- ; in Milwaukee, 1953-1965; in Boston (also as Bees, Rustlers, Doves, Beaneaters, Red Caps), 1876-1952
Mets in New York, 1962-
Marlins in Florida (Miami), 1993-
Nationals in Washington, 2005- ; in Montreal (as Expos), 1969-2004
Rockies in Colorado (Denver), 1993-
Phillies in Philadelphia (also as Quakers), 1883-
Padres in San Diego, 1969-
Brewers in Milwaukee, 1998- (see AL entry for previous history)
American League
Yankees in New York (also as Highlanders), 1903- ; in Baltimore (as Orioles), 1901-1902
Red Sox in Boston (also as Americans), 1901-
Indians in Cleveland (also as Naps, Bronchos, Blues), 1901-
Tigers in Detroit, 1901-
White Sox in Chicago, 1901-
Angels in Anaheim, 1961- , but indentified variously as Los Angeles Angels of Anaheim, Anaheim Angels, California Angels, Los Angeles Angels
Blue Jays in Toronto, 1977-
Athletics in Oakland, 1968- ; in Kansas City, 1955-1967; in Philadelphia, 1901-1954
Twins in Minnesota (Minneapolis), 1961- ; in Washington (as Senators), 1901-1960
Royals in Kansas City, 1969-
Brewers in Milwaukee, 1970-1997; in Seattle (as Pilots), 1969
Orioles in Baltimore, 1954- ; in St. Louis (as Browns), 1902-1953; in Milwaukee (as Brewers), 1901
Rangers in Texas (Arlington), 1972- ; in Washington (as Senators) 1961-1971
Mariners in Seattle, 1977-
Rays in Tampa Bay (St. Petersburg, also as Devil Rays), 1998-