Pipe dream scenario: Move Houston to the AL west (natural rivalry with Texas, similar intradivisional travel overall, yes the trip to Seattle will suck, sorry). This creates 6 divisions of 15 teams each, forcing at least one interleague series each week. On average, there are 54 series in a year (54 * 3 = 162), so there will have to be at a bare minimum of 11 interleague games per team. To make the most balanced schedule that still focuses on games within the division, this is what I would suggest: 16 games with each divisional opponent: 16*4 = 64 8 games with each league opponent outside the division: 10*8 = 80 3 interleague games with each team in a division that rotates every year + 3 games vs. interleague "rival": 6 * 3 = 18 64 + 80 + 18 = 162 This way you still get twice as many games within the division as outside the division, you get enough interleague games to spread out over the season while still having the ability to set up a "rivalry weekend" where every team plays their rival in an interleague matchup. Every team plays their rival at least 3 times a year, and in a year they play their rival's division, they even get a home and home with them. The schedule is completely balanced within the division aside from the 3 rivalry games and home/away differences. It may appear to cause an increase in 4 or 2-game series (as each divisional series has 4 odd games and each interdivisional series has 2 odd games, making 36 games per team that don't fit into traditional 3-game series), but actually there would be less need for those series, as the Cubs are scheduled to play 42 games this year in such series. As the playoffs go, I am also in favor of the extra wildcard team with a single wildcard game, although it would create an interesting scenario if 3 teams tied for a wildcard spot.