| Anaheim Angels, see Los Angeles Angels |
1 | Arizona Diamondbacks | 1998 | 2021 | 3,639 | 1,793 | 1,846 | .493 | -53 | 5 | 1 | 1 | 6 | 517 | 2 | 16,560 | 124,498 | 31,918 | 3,871 | .256 | 16,689 | 4.22 |
2 | Atlanta Braves | 1876 | 2021 | 21,585 | 10,738 | 10,693 | .501 | 45 | 20 | 17 | 3 | 26 | 2038 | 53 | 96,163 | 739,219 | 192,119 | 14,023 | .260 | 95,303 | 3.67 |
| Also played as Milwaukee Braves, Boston Braves, Boston Bees, Boston Rustlers, Boston Doves, Boston Beaneaters and Boston Red Stockings |
3 | Baltimore Orioles | 1901 | 2021 | 18,681 | 8,800 | 9,771 | .474 | -971 | 9 | 7 | 3 | 14 | 1880 | 34 | 80,559 | 634,692 | 164,095 | 13,610 | .259 | 85,847 | 4.04 |
| Also played as St. Louis Browns and Milwaukee Brewers |
| Boston Braves, see Atlanta Braves |
4 | Boston Red Sox | 1901 | 2021 | 18,667 | 9,636 | 8,948 | .519 | 688 | 10 | 14 | 9 | 24 | 1848 | 37 | 87,136 | 638,890 | 170,727 | 13,810 | .267 | 83,555 | 3.91 |
| Also played as Boston Americans |
| Brooklyn Dodgers, see Los Angeles Dodgers |
| California Angels, see Los Angeles Angels |
5 | Chicago Cubs | 1876 | 2021 | 21,621 | 11,022 | 10,438 | .514 | 584 | 8 | 17 | 3 | 21 | 2128 | 45 | 99,560 | 740,324 | 194,273 | 14,469 | .262 | 96,004 | 3.68 |
| Also played as Chicago Orphans, Chicago Colts and Chicago White Stockings |
6 | Chicago White Sox | 1901 | 2021 | 18,675 | 9,324 | 9,248 | .502 | 76 | 5 | 6 | 3 | 10 | 1813 | 32 | 81,361 | 632,528 | 164,649 | 11,619 | .260 | 81,067 | 3.78 |
7 | Cincinnati Reds | 1882 | 2021 | 21,205 | 10,639 | 10,427 | .505 | 212 | 10 | 10 | 5 | 16 | 2041 | 36 | 95,171 | 722,992 | 188,820 | 13,545 | .261 | 94,234 | 3.75 |
| Also played as Cincinnati Redlegs and Cincinnati Red Stockings |
8 | Cleveland Indians | 1901 | 2021 | 18,679 | 9,519 | 9,069 | .512 | 450 | 10 | 6 | 2 | 15 | 1923 | 34 | 84,597 | 637,029 | 169,079 | 13,247 | .265 | 82,463 | 3.83 |
| Also played as Cleveland Naps, Cleveland Bronchos and Cleveland Blues |
9 | Colorado Rockies | 1993 | 2021 | 4,388 | 2,063 | 2,325 | .470 | -262 | 0 | 1 | 0 | 5 | 599 | 1 | 22,136 | 151,102 | 41,355 | 5,030 | .274 | 23,178 | 4.98 |
10 | Detroit Tigers | 1901 | 2021 | 18,703 | 9,375 | 9,235 | .504 | 140 | 7 | 11 | 4 | 16 | 1727 | 24 | 86,218 | 638,242 | 169,231 | 13,924 | .265 | 85,765 | 4.00 |
11 | Houston Astros | 1962 | 2021 | 9,346 | 4,637 | 4,704 | .496 | -67 | 10 | 3 | 1 | 14 | 934 | 10 | 39,469 | 317,076 | 80,751 | 7,553 | .255 | 39,396 | 3.81 |
| Also played as Houston Colt .45s |
| Kansas City Athletics, see Oakland Athletics |
12 | Kansas City Royals | 1969 | 2021 | 8,198 | 3,935 | 4,261 | .480 | -326 | 8 | 4 | 2 | 9 | 928 | 4 | 35,996 | 280,870 | 74,138 | 6,350 | .264 | 37,788 | 4.24 |
13 | Los Angeles Angels | 1961 | 2021 | 9,504 | 4,743 | 4,758 | .499 | -15 | 9 | 1 | 1 | 10 | 1117 | 12 | 41,235 | 322,785 | 83,025 | 8,390 | .257 | 41,512 | 3.98 |
| Also played as Los Angeles Angels of Anaheim, Anaheim Angels and California Angels |
14 | Los Angeles Dodgers | 1884 | 2021 | 21,006 | 11,030 | 9,837 | .529 | 1193 | 19 | 25 | 7 | 34 | 1865 | 50 | 94,312 | 715,821 | 187,185 | 13,145 | .261 | 89,054 | 3.53 |
| Also played as Brooklyn Dodgers, Brooklyn Robins, Brooklyn Superbas, Brooklyn Bridegrooms, Brooklyn Grooms, Brooklyn Grays and Brooklyn Atlantics |
15 | Miami Marlins | 1993 | 2021 | 4,378 | 2,028 | 2,350 | .463 | -322 | 0 | 2 | 2 | 3 | 638 | 5 | 18,646 | 149,080 | 38,276 | 3,957 | .257 | 20,372 | 4.31 |
| Also played as Florida Marlins |
| Milwaukee Braves, see Atlanta Braves |
16 | Milwaukee Brewers | 1969 | 2021 | 8,208 | 3,950 | 4,254 | .481 | -304 | 4 | 1 | 0 | 7 | 935 | 7 | 36,398 | 278,999 | 71,819 | 7,923 | .257 | 37,566 | 4.18 |
| Also played as Seattle Pilots |
| Milwaukee Brewers (1901), see Baltimore Orioles |
17 | Minnesota Twins | 1901 | 2021 | 18,689 | 8,945 | 9,635 | .481 | -690 | 12 | 6 | 3 | 17 | 1724 | 25 | 82,103 | 637,811 | 167,668 | 11,163 | .263 | 85,383 | 3.99 |
| Also played as Washington Senators |
| Montreal Expos, see Washington Nationals |
| New York Giants, see San Francisco Giants |
18 | New York Mets | 1962 | 2021 | 9,334 | 4,480 | 4,846 | .480 | -366 | 6 | 5 | 2 | 9 | 1122 | 15 | 38,268 | 316,140 | 79,091 | 7,763 | .250 | 39,291 | 3.80 |
19 | New York Yankees | 1903 | 2021 | 18,380 | 10,416 | 7,876 | .569 | 2540 | 19 | 40 | 27 | 56 | 1715 | 46 | 89,408 | 627,013 | 167,025 | 16,324 | .266 | 76,770 | 3.65 |
| Also played as New York Highlanders |
20 | Oakland Athletics | 1901 | 2021 | 18,642 | 9,072 | 9,483 | .489 | -411 | 17 | 15 | 9 | 29 | 1996 | 41 | 82,626 | 632,362 | 163,397 | 13,396 | .258 | 85,043 | 3.98 |
| Also played as Kansas City Athletics and Philadelphia Athletics |
| Philadelphia Athletics, see Oakland Athletics |
21 | Philadelphia Phillies | 1883 | 2021 | 21,014 | 9,860 | 11,039 | .472 | -1179 | 12 | 7 | 2 | 14 | 2110 | 35 | 93,110 | 719,237 | 187,472 | 13,333 | .261 | 99,104 | 3.98 |
| Also played as Philadelphia Quakers |
22 | Pittsburgh Pirates | 1882 | 2021 | 21,165 | 10,570 | 10,455 | .503 | 115 | 9 | 9 | 5 | 17 | 2022 | 40 | 94,522 | 725,666 | 191,698 | 11,630 | .264 | 94,117 | 3.73 |
| Also played as Pittsburgh Alleghenys |
23 | San Diego Padres | 1969 | 2021 | 8,214 | 3,793 | 4,419 | .462 | -626 | 5 | 2 | 0 | 6 | 1061 | 12 | 32,964 | 277,827 | 69,307 | 6,506 | .249 | 36,086 | 3.97 |
24 | San Francisco Giants | 1883 | 2021 | 21,089 | 11,202 | 9,724 | .535 | 1478 | 8 | 23 | 8 | 26 | 1840 | 57 | 97,615 | 720,165 | 189,964 | 14,782 | .264 | 90,349 | 3.58 |
| Also played as New York Giants and New York Gothams |
25 | Seattle Mariners | 1977 | 2021 | 6,918 | 3,255 | 3,661 | .471 | -406 | 3 | 0 | 0 | 4 | 900 | 6 | 30,760 | 236,502 | 61,353 | 6,890 | .259 | 32,611 | 4.34 |
| Seattle Pilots, see Milwaukee Brewers |
| St. Louis Browns, see Baltimore Orioles |
26 | St. Louis Cardinals | 1882 | 2021 | 21,205 | 10,955 | 10,098 | .520 | 857 | 14 | 23 | 11 | 30 | 2147 | 47 | 97,317 | 727,235 | 193,554 | 12,370 | .266 | 93,393 | 3.68 |
| Also played as St. Louis Perfectos, St. Louis Browns and St. Louis Brown Stockings |
27 | Tampa Bay Rays | 1998 | 2021 | 3,637 | 1,733 | 1,904 | .476 | -171 | 3 | 2 | 0 | 6 | 519 | 1 | 16,063 | 123,890 | 31,670 | 3,730 | .256 | 16,946 | 4.32 |
| Also played as Tampa Bay Devil Rays |
28 | Texas Rangers | 1961 | 2021 | 9,493 | 4,528 | 4,959 | .477 | -431 | 7 | 2 | 0 | 8 | 1173 | 8 | 42,772 | 324,303 | 84,005 | 9,389 | .259 | 44,751 | 4.28 |
| Also played as Washington Senators |
29 | Toronto Blue Jays | 1977 | 2021 | 6,919 | 3,422 | 3,494 | .495 | -72 | 6 | 2 | 2 | 8 | 850 | 8 | 31,967 | 237,268 | 61,785 | 7,429 | .260 | 31,852 | 4.24 |
30 | Washington Nationals | 1969 | 2021 | 8,202 | 4,008 | 4,190 | .489 | -182 | 5 | 1 | 1 | 6 | 969 | 10 | 34,377 | 277,623 | 70,534 | 6,962 | .254 | 35,221 | 3.89 |
| Also played as Montreal Expos |
| Washington Senators (1901-1960), see Minnesota Twins |
| Washington Senators (1961-1971), see Texas Rangers |
Earlier Franchises