Major League Baseball, a North American sports league, is a business worth almost $11bn annually. The top league of the sport known as 'America's pastime', it is one of the world's most watched sports leagues, with the 2022 World Series attracting over 11.5 million viewers per game.

MLB is a 'closed league' - meaning that the number and location of teams is determined by the existing owners of the league's franchises. On occasion, MLB 'expands', meaning that the existing owners agree to add additional teams into the league, historically in exchange for a large monetary sum. This has substantial financial and cultural consequences, with vast sums of money transferred between billionaires and the citizens of new cities having the chance to root for a hometown baseball team (often in exchange for their taxpayer dollars - teams tend to be wooed to a city by the local government offering public funding for stadiums and other infrastructure).

The number of teams in MLB is currently 30. This question asks whether the number of teams playing in the league will increase as a result of expansion by 2030.