| Anaheim Angels, see Los Angeles Angels |
1 | Arizona Diamondbacks | 1998 | 2025 | 4,434 | 2,167 | 2,267 | .489 | -100 | 5 | 2 | 1 | 7 | 645 | 2 | 20,296 | 151,251 | 38,521 | 4,759 | .255 | 20,575 | 4.29 |
2 | Athletics | 1901 | 2025 | 19,437 | 9,405 | 9,945 | .486 | -540 | 17 | 15 | 9 | 29 | 2147 | 43 | 85,832 | 658,868 | 169,577 | 14,300 | .257 | 88,927 | 4.00 |
| Also played as Oakland Athletics, Kansas City Athletics and Philadelphia Athletics |
3 | Atlanta Braves | 1876 | 2025 | 22,379 | 11,190 | 11,035 | .503 | 155 | 23 | 18 | 4 | 30 | 2165 | 55 | 100,049 | 766,192 | 198,936 | 15,195 | .260 | 98,546 | 3.67 |
| Also played as Milwaukee Braves, Boston Braves, Boston Bees, Boston, Boston Doves, Boston Nationals and Boston Reds |
4 | Baltimore Orioles | 1901 | 2025 | 19,476 | 9,195 | 10,171 | .475 | -976 | 10 | 7 | 3 | 16 | 2021 | 34 | 84,098 | 661,524 | 170,623 | 14,570 | .258 | 89,588 | 4.05 |
| Also played as St. Louis Browns and Milwaukee Brewers |
| Boston Braves, see Atlanta Braves |
5 | Boston Red Sox | 1901 | 2025 | 19,463 | 10,044 | 9,336 | .518 | 708 | 10 | 14 | 9 | 26 | 1978 | 40 | 90,927 | 666,141 | 177,707 | 14,729 | .267 | 87,234 | 3.92 |
| Also played as Boston Americans |
| Brooklyn Dodgers, see Los Angeles Dodgers |
| California Angels, see Los Angeles Angels |
6 | Chicago Cubs | 1876 | 2025 | 22,417 | 11,419 | 10,837 | .513 | 582 | 8 | 17 | 3 | 22 | 2277 | 46 | 103,223 | 767,066 | 200,830 | 15,407 | .262 | 99,554 | 3.70 |
| Also played as Chicago, Chicago Orphans, Chicago Colts and Chicago White Stockings |
7 | Chicago White Sox | 1901 | 2025 | 19,471 | 9,654 | 9,714 | .498 | -60 | 6 | 6 | 3 | 11 | 1948 | 35 | 84,569 | 659,281 | 171,090 | 12,414 | .260 | 84,760 | 3.80 |
8 | Cincinnati Reds | 1882 | 2025 | 22,001 | 11,017 | 10,845 | .504 | 172 | 10 | 10 | 5 | 17 | 2189 | 38 | 98,715 | 749,591 | 195,242 | 14,439 | .260 | 97,944 | 3.77 |
| Also played as Cincinnati Redlegs and Cincinnati |
9 | Cleveland Guardians | 1901 | 2025 | 19,474 | 9,940 | 9,443 | .513 | 497 | 13 | 6 | 2 | 18 | 2023 | 36 | 87,974 | 663,603 | 175,506 | 14,035 | .264 | 85,742 | 3.83 |
| Also played as Cleveland Indians, Cleveland Naps, Cleveland Napoleons, Cleveland Blues and Cleveland |
10 | Colorado Rockies | 1993 | 2025 | 5,182 | 2,364 | 2,818 | .456 | -454 | 0 | 1 | 0 | 5 | 702 | 2 | 25,508 | 177,878 | 47,958 | 5,846 | .270 | 27,680 | 5.05 |
11 | Detroit Tigers | 1901 | 2025 | 19,498 | 9,763 | 9,642 | .503 | 121 | 7 | 11 | 4 | 18 | 1833 | 24 | 89,520 | 664,882 | 175,576 | 14,718 | .264 | 89,227 | 4.00 |
12 | Houston Astros | 1962 | 2025 | 10,141 | 5,096 | 5,040 | .503 | 56 | 14 | 5 | 2 | 18 | 1027 | 11 | 43,252 | 344,176 | 87,719 | 8,563 | .255 | 42,525 | 3.80 |
| Also played as Houston Colt .45s |
| Kansas City Athletics, see Oakland Athletics |
13 | Kansas City Royals | 1969 | 2025 | 8,995 | 4,290 | 4,703 | .477 | -413 | 8 | 4 | 2 | 10 | 1033 | 4 | 39,324 | 307,598 | 80,723 | 7,131 | .262 | 41,467 | 4.25 |
14 | Los Angeles Angels | 1961 | 2025 | 10,301 | 5,093 | 5,205 | .495 | -112 | 9 | 1 | 1 | 10 | 1272 | 13 | 44,557 | 349,413 | 89,283 | 9,375 | .256 | 45,379 | 4.02 |
| Also played as Los Angeles Angels of Anaheim, Anaheim Angels and California Angels |
15 | Los Angeles Dodgers | 1884 | 2025 | 21,801 | 11,525 | 10,137 | .532 | 1388 | 23 | 26 | 8 | 39 | 2003 | 54 | 98,474 | 742,799 | 194,021 | 14,299 | .261 | 92,149 | 3.53 |
| Also played as Brooklyn Dodgers, Brooklyn Robins, Brooklyn Superbas, Brooklyn Grooms, Brooklyn and Brooklyn Bridegrooms |
16 | Miami Marlins | 1993 | 2025 | 5,174 | 2,382 | 2,792 | .460 | -410 | 0 | 2 | 2 | 4 | 789 | 6 | 21,801 | 175,900 | 44,799 | 4,718 | .255 | 24,049 | 4.31 |
| Also played as Florida Marlins |
| Milwaukee Braves, see Atlanta Braves |
17 | Milwaukee Brewers | 1969 | 2025 | 9,004 | 4,405 | 4,595 | .489 | -190 | 8 | 1 | 0 | 11 | 1074 | 9 | 40,111 | 305,685 | 78,316 | 8,831 | .256 | 40,753 | 4.13 |
| Also played as Seattle Pilots |
| Milwaukee Brewers (1901), see Baltimore Orioles |
18 | Minnesota Twins | 1901 | 2025 | 19,485 | 9,329 | 10,047 | .481 | -718 | 13 | 6 | 3 | 18 | 1848 | 29 | 85,659 | 664,656 | 174,199 | 12,162 | .262 | 89,007 | 4.00 |
| Also played as Washington Senators and Washington Nationals |
| Montreal Expos, see Washington Nationals |
| New York Giants, see San Francisco Giants |
19 | New York Mets | 1962 | 2025 | 10,134 | 4,899 | 5,227 | .484 | -328 | 6 | 5 | 2 | 11 | 1287 | 17 | 41,892 | 342,866 | 85,672 | 8,750 | .250 | 42,670 | 3.81 |
20 | New York Yankees | 1903 | 2025 | 19,176 | 10,872 | 8,216 | .570 | 2656 | 21 | 41 | 27 | 60 | 1837 | 49 | 93,210 | 653,549 | 173,429 | 17,515 | .265 | 79,997 | 3.66 |
| Also played as New York Highlanders |
| Oakland Athletics, see Athletics |
| Philadelphia Athletics, see Oakland Athletics |
21 | Philadelphia Phillies | 1883 | 2025 | 21,810 | 10,303 | 11,392 | .475 | -1089 | 14 | 8 | 2 | 18 | 2211 | 39 | 96,894 | 746,249 | 194,313 | 14,354 | .260 | 102,509 | 3.98 |
| Also played as Philadelphia Phils and Philadelphia |
22 | Pittsburgh Pirates | 1882 | 2025 | 21,960 | 10,910 | 10,910 | .500 | 0 | 9 | 9 | 5 | 17 | 2176 | 41 | 97,603 | 752,088 | 197,846 | 12,336 | .263 | 97,865 | 3.76 |
| Also played as Pittsburgh and Allegheny City |
23 | San Diego Padres | 1969 | 2025 | 9,008 | 4,217 | 4,789 | .468 | -572 | 5 | 2 | 0 | 9 | 1186 | 13 | 36,548 | 304,496 | 75,939 | 7,370 | .249 | 39,338 | 3.96 |
24 | San Francisco Giants | 1883 | 2025 | 21,885 | 11,622 | 10,100 | .535 | 1522 | 9 | 23 | 8 | 27 | 1971 | 57 | 101,159 | 746,819 | 196,327 | 15,711 | .263 | 93,696 | 3.59 |
| Also played as New York Giants and New York |
25 | Seattle Mariners | 1977 | 2025 | 7,713 | 3,689 | 4,022 | .478 | -333 | 4 | 0 | 0 | 6 | 1036 | 8 | 34,284 | 263,091 | 67,561 | 7,903 | .257 | 35,871 | 4.28 |
| Seattle Pilots, see Milwaukee Brewers |
| St. Louis Browns, see Baltimore Orioles |
26 | St. Louis Cardinals | 1882 | 2025 | 22,001 | 11,363 | 10,486 | .520 | 877 | 15 | 23 | 11 | 32 | 2236 | 51 | 100,804 | 754,068 | 200,206 | 13,267 | .266 | 96,928 | 3.69 |
| Also played as St. Louis and St. Louis Browns |
27 | Tampa Bay Rays | 1998 | 2025 | 4,432 | 2,168 | 2,264 | .489 | -96 | 4 | 2 | 0 | 9 | 649 | 2 | 19,700 | 150,671 | 38,234 | 4,634 | .254 | 20,143 | 4.21 |
| Also played as Tampa Bay Devil Rays |
28 | Texas Rangers | 1961 | 2025 | 10,288 | 4,899 | 5,383 | .476 | -484 | 7 | 3 | 1 | 9 | 1292 | 10 | 46,294 | 351,200 | 90,502 | 10,322 | .258 | 48,297 | 4.28 |
| Also played as Washington Senators |
29 | Toronto Blue Jays | 1977 | 2025 | 7,714 | 3,855 | 3,856 | .500 | -1 | 7 | 2 | 2 | 11 | 966 | 11 | 35,737 | 264,282 | 68,775 | 8,407 | .260 | 35,274 | 4.22 |
30 | Washington Nationals | 1969 | 2025 | 9,000 | 4,331 | 4,665 | .481 | -334 | 5 | 1 | 1 | 6 | 1088 | 10 | 37,707 | 304,365 | 77,186 | 7,716 | .254 | 39,348 | 3.97 |
| Also played as Montreal Expos |
| Washington Senators/Nationals (1901-1960), see Minnesota Twins |
| Washington Senators (1961-1971), see Texas Rangers |
Inactive Franchises