The Major League Baseball (MLB) season is a marathon, featuring 162 games for each of its 30 teams—a total of 2,430 contests—played from late March to early October, with the postseason potentially stretching into November. To minimize travel, teams play in multi-game series rather than single games, typically scheduling one mid-week and one weekend series per week. Since 2023, a balanced schedule has been used, with teams facing division rivals 13 times, other league opponents 6-7 times, and playing 48 interleague games, including a home-and-away set against a designated geographic rival. While rainouts are usually rescheduled, games without playoff implications may be skipped, as happened with the 2024 Astros-Guardians cancellation. The intricate task of crafting this calendar has a notable history, passing from Harry Simmons (1953–1981) to the husband-and-wife team of Henry and Holly Stephenson (1981–2004), and finally to the Sports Scheduling Group in 2005.