| | Anaheim Angels, see Los Angeles Angels |
| 1 | Arizona Diamondbacks | 1998 | 2023 | 3,996 | 1,942 | 2,054 | .486 | -112 | 5 | 1 | 1 | 6 | 580 | 2 | 18,121 | 136,449 | 34,768 | 4,222 | .255 | 18,474 | 4.26 |
| 2 | Atlanta Braves | 1876 | 2023 | 21,940 | 10,950 | 10,836 | .503 | 114 | 22 | 18 | 4 | 28 | 2092 | 54 | 97,920 | 751,201 | 195,122 | 14,563 | .260 | 96,674 | 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 | 2023 | 19,037 | 8,959 | 9,968 | .473 | -1009 | 9 | 7 | 3 | 14 | 1944 | 34 | 82,068 | 646,634 | 166,963 | 14,019 | .258 | 87,622 | 4.05 |
| | Also played as St. Louis Browns and Milwaukee Brewers |
| | Boston Braves, see Atlanta Braves |
| 4 | Boston Red Sox | 1901 | 2023 | 19,025 | 9,822 | 9,120 | .519 | 702 | 10 | 14 | 9 | 25 | 1902 | 38 | 88,877 | 651,084 | 173,889 | 14,225 | .267 | 85,279 | 3.92 |
| | Also played as Boston Americans |
| | Brooklyn Dodgers, see Los Angeles Dodgers |
| | California Angels, see Los Angeles Angels |
| 5 | Chicago Cubs | 1876 | 2023 | 21,977 | 11,181 | 10,635 | .513 | 546 | 8 | 17 | 3 | 21 | 2216 | 46 | 101,095 | 752,212 | 197,158 | 14,876 | .262 | 97,712 | 3.69 |
| | Also played as Chicago Orphans, Chicago Colts and Chicago White Stockings |
| 6 | Chicago White Sox | 1901 | 2023 | 19,034 | 9,511 | 9,420 | .502 | 91 | 6 | 6 | 3 | 11 | 1850 | 34 | 82,977 | 644,689 | 167,747 | 11,996 | .260 | 82,624 | 3.79 |
| 7 | Cincinnati Reds | 1882 | 2023 | 21,562 | 10,795 | 10,628 | .504 | 167 | 10 | 10 | 5 | 16 | 2119 | 37 | 96,718 | 734,874 | 191,686 | 13,936 | .261 | 95,991 | 3.76 |
| | Also played as Cincinnati Redlegs and Cincinnati Red Stockings |
| 8 | Cleveland Guardians | 1901 | 2023 | 19,036 | 9,705 | 9,240 | .512 | 465 | 11 | 6 | 2 | 16 | 1972 | 35 | 86,128 | 649,025 | 172,017 | 13,587 | .265 | 83,973 | 3.83 |
| | Also played as Cleveland Indians, Cleveland Naps, Cleveland Bronchos and Cleveland Blues |
| 9 | Colorado Rockies | 1993 | 2023 | 4,744 | 2,221 | 2,523 | .468 | -302 | 0 | 1 | 0 | 5 | 641 | 1 | 23,721 | 163,139 | 44,405 | 5,382 | .272 | 25,030 | 4.98 |
| 10 | Detroit Tigers | 1901 | 2023 | 19,057 | 9,533 | 9,431 | .503 | 102 | 7 | 11 | 4 | 16 | 1771 | 24 | 87,584 | 650,043 | 172,016 | 14,231 | .265 | 87,367 | 4.00 |
| 11 | Houston Astros | 1962 | 2023 | 9,703 | 4,859 | 4,839 | .501 | 20 | 12 | 5 | 2 | 16 | 970 | 10 | 41,212 | 329,163 | 83,848 | 8,014 | .255 | 40,678 | 3.79 |
| | Also played as Houston Colt .45s |
| | Kansas City Athletics, see Oakland Athletics |
| 12 | Kansas City Royals | 1969 | 2023 | 8,558 | 4,080 | 4,476 | .477 | -396 | 8 | 4 | 2 | 9 | 971 | 4 | 37,452 | 292,951 | 77,083 | 6,688 | .263 | 39,591 | 4.26 |
| 13 | Los Angeles Angels | 1961 | 2023 | 9,864 | 4,911 | 4,950 | .498 | -39 | 9 | 1 | 1 | 10 | 1185 | 12 | 42,751 | 334,861 | 85,935 | 8,814 | .257 | 43,149 | 3.99 |
| | Also played as Los Angeles Angels of Anaheim, Anaheim Angels and California Angels |
| 14 | Los Angeles Dodgers | 1884 | 2023 | 21,364 | 11,264 | 9,961 | .531 | 1303 | 20 | 25 | 7 | 36 | 1927 | 52 | 96,169 | 727,904 | 190,174 | 13,652 | .261 | 90,299 | 3.52 |
| | Also played as Brooklyn Dodgers, Brooklyn Robins, Brooklyn Superbas, Brooklyn Bridegrooms, Brooklyn Grooms, Brooklyn Grays and Brooklyn Atlantics |
| 15 | Miami Marlins | 1993 | 2023 | 4,736 | 2,181 | 2,555 | .461 | -374 | 0 | 2 | 2 | 3 | 704 | 5 | 19,956 | 160,948 | 41,044 | 4,291 | .255 | 21,910 | 4.29 |
| | Also played as Florida Marlins |
| | Milwaukee Braves, see Atlanta Braves |
| 16 | Milwaukee Brewers | 1969 | 2023 | 8,565 | 4,148 | 4,413 | .485 | -265 | 5 | 1 | 0 | 8 | 1002 | 7 | 37,995 | 290,860 | 74,611 | 8,380 | .257 | 39,038 | 4.16 |
| | Also played as Seattle Pilots |
| | Milwaukee Brewers (1901), see Baltimore Orioles |
| 17 | Minnesota Twins | 1901 | 2023 | 19,047 | 9,115 | 9,823 | .481 | -708 | 12 | 6 | 3 | 17 | 1795 | 28 | 83,681 | 649,866 | 170,589 | 11,619 | .262 | 87,020 | 3.99 |
| | Also played as Washington Senators |
| | Montreal Expos, see Washington Nationals |
| | New York Giants, see San Francisco Giants |
| 18 | New York Mets | 1962 | 2023 | 9,696 | 4,677 | 5,011 | .483 | -334 | 6 | 5 | 2 | 10 | 1201 | 16 | 39,848 | 328,125 | 82,067 | 8,158 | .250 | 40,750 | 3.80 |
| 19 | New York Yankees | 1903 | 2023 | 18,739 | 10,631 | 8,020 | .570 | 2611 | 20 | 40 | 27 | 58 | 1769 | 47 | 91,099 | 638,916 | 169,880 | 16,858 | .266 | 78,141 | 3.65 |
| | Also played as New York Highlanders |
| 20 | Oakland Athletics | 1901 | 2023 | 19,000 | 9,220 | 9,693 | .487 | -473 | 17 | 15 | 9 | 29 | 2070 | 41 | 84,049 | 644,221 | 166,091 | 13,767 | .258 | 86,777 | 3.99 |
| | Also played as Kansas City Athletics and Philadelphia Athletics |
| | Philadelphia Athletics, see Oakland Athletics |
| 21 | Philadelphia Phillies | 1883 | 2023 | 21,371 | 10,044 | 11,212 | .473 | -1168 | 12 | 8 | 2 | 15 | 2170 | 37 | 94,737 | 731,263 | 190,462 | 13,774 | .260 | 100,707 | 3.99 |
| | Also played as Philadelphia Quakers |
| 22 | Pittsburgh Pirates | 1882 | 2023 | 21,521 | 10,712 | 10,669 | .501 | 43 | 9 | 9 | 5 | 17 | 2103 | 40 | 95,872 | 737,383 | 194,406 | 11,943 | .264 | 95,881 | 3.75 |
| | Also played as Pittsburgh Alleghenys |
| 23 | San Diego Padres | 1969 | 2023 | 8,569 | 3,973 | 4,594 | .464 | -621 | 5 | 2 | 0 | 7 | 1119 | 13 | 34,516 | 289,672 | 72,137 | 6,873 | .249 | 37,590 | 3.97 |
| 24 | San Francisco Giants | 1883 | 2023 | 21,446 | 11,405 | 9,878 | .536 | 1527 | 9 | 23 | 8 | 27 | 1909 | 57 | 99,292 | 732,151 | 192,870 | 15,253 | .263 | 91,814 | 3.58 |
| | Also played as New York Giants and New York Gothams |
| 25 | Seattle Mariners | 1977 | 2023 | 7,274 | 3,449 | 3,823 | .474 | -374 | 3 | 0 | 0 | 5 | 972 | 6 | 32,297 | 248,338 | 64,051 | 7,320 | .258 | 34,097 | 4.32 |
| | Seattle Pilots, see Milwaukee Brewers |
| | St. Louis Browns, see Baltimore Orioles |
| 26 | St. Louis Cardinals | 1882 | 2023 | 21,564 | 11,152 | 10,260 | .521 | 892 | 15 | 23 | 11 | 32 | 2191 | 50 | 98,974 | 739,311 | 196,578 | 12,813 | .266 | 94,859 | 3.68 |
| | Also played as St. Louis Perfectos, St. Louis Browns and St. Louis Brown Stockings |
| 27 | Tampa Bay Rays | 1998 | 2023 | 3,995 | 1,947 | 2,048 | .487 | -101 | 4 | 2 | 0 | 8 | 582 | 2 | 17,818 | 135,964 | 34,637 | 4,169 | .255 | 18,302 | 4.24 |
| | Also played as Tampa Bay Devil Rays |
| 28 | Texas Rangers | 1961 | 2023 | 9,849 | 4,679 | 5,164 | .475 | -485 | 7 | 2 | 0 | 8 | 1226 | 9 | 44,347 | 336,315 | 86,896 | 9,802 | .258 | 46,433 | 4.29 |
| | Also played as Washington Senators |
| 29 | Toronto Blue Jays | 1977 | 2023 | 7,276 | 3,623 | 3,650 | .498 | -27 | 6 | 2 | 2 | 9 | 903 | 10 | 33,740 | 249,472 | 65,016 | 7,924 | .261 | 33,352 | 4.22 |
| 30 | Washington Nationals | 1969 | 2023 | 8,561 | 4,143 | 4,414 | .484 | -271 | 5 | 1 | 1 | 6 | 1030 | 10 | 35,853 | 289,645 | 73,586 | 7,303 | .254 | 37,054 | 3.92 |
| | Also played as Montreal Expos |
| | Washington Senators (1901-1960), see Minnesota Twins |
| | Washington Senators (1961-1971), see Texas Rangers |
Inactive Franchises