^With an odd number of teams (15), only seven games would be able to be scheduled in each league on any given day during the intra-league portion of the regular season. Thus, one team in each league would have had to be idle on any given day. This would have made it difficult for scheduling, in terms of travel days and the need to end the regular season before October. SeeMajor League Baseball#League organization. If each league had wished to remain at fifteen teams, the schedule would have had to include one inter-league game during each day of intra-league play. Instead, with each league now having an even number of teams, interleague games occur only in certain parts of the regular season.