The Louisville Colonels won 15 American Association titles, the most in the league's history, followed by the Indianapolis Indians (12) and the Columbus Red Birds (10).

[6] Its teams, featuring former major league players and top minor leaguers, were both competitive and profitable.

[11] On June 9, 1930, the league's first night game was played in Indianapolis as the Indians defeated the St. Paul Saints, 1–0, at Washington Park.

The Columbus Red Birds beat the Minneapolis Millers, four games to two, for the first AA playoff championship.

In 1936, the league adopted the Shaughnessy playoff system in which the top four teams qualified for postseason play.

The AA would still recognize a pennant winner, but the playoff champion would represent the league at the Junior World Series and be the recipient of a Governors' Cup.

[15] In the semi-finals, Indianapolis ousted St. Paul, and the Milwaukee Brewers swept the Kansas City Blues.

[16] Unlike other minor leagues, the American Association survived the 1930s as the only circuit to play its full season schedule without stoppage, reducing its membership, or any teams disbanding.

[19][20] The American Association's attendance base began to be eroded significantly in the 1950s and early 1960s due to expansion and westward migration of Major League Baseball teams into several of the AA's larger member cities, especially Milwaukee, Kansas City, and Minneapolis-Saint Paul.

Another contributing factor was the increased frequency of televised games, both of MLB teams and the AA's own clubs, enticing fans to watch baseball from the comfort of their own homes.

[21] Toledo suffered such poor attendance that the team folded during the 1952 season and was transferred to Charleston, West Virginia.

The Indianapolis Indians joined the IL, and the Dallas-Fort Worth Rangers, Denver Bears, and Oklahoma City 89ers went to the PCL.

[28] In 1970, the AA returned to a two-division format, reintroduced the All-Star Game and playoffs, and expanded to eight cities with the addition of Wichita, Kansas, and Evansville, Indiana.

Affordable ticket prices, exciting giveaways and promotions, and new ballparks helped lure fans, especially families, back to minor league games.

[32] From 1982 to 1986, the Louisville Redbirds led all of Minor League Baseball in attendance,[33] including the 1983 season in which the club drew over one million fans.

At the end of each season, an Alliance champion was determined in the Triple-A Classic, a best-of-seven postseason series.

The Iowa Cubs, Nashville Sounds, New Orleans Zephyrs, Oklahoma City 89ers, and Omaha Royals joined an enlarged, 16-team Pacific Coast League.

The Buffalo Bisons, Indianapolis Indians and Louisville Redbirds became part of an expanded, 14-team International League.

The first Little World Series, as it was called from 1904 to 1931, saw the IL's Buffalo Bisons defeat the AA's St. Paul Saints, 2–1.

From 1902 to 1931, the league champions were simply the regular-season pennant winners—the team with the best win–loss record at the conclusion of the regular season.

[4] The Louisville Colonels won 15 American Association titles, the most in the league's history, followed by the Indianapolis Indians (12) and the Columbus Red Birds (10).

[4] The American Association regularly honored outstanding players and team personnel at the end of each season.