30T, 3SL, 2D w/ Interleague, 162G
 

Let me explain the league to better understand the schedule request.

Currently a two-state league with ten teams each. Expanding to a 3rd state, with an additional ten teams.

Therefore, looking for 162 games, with 30 teams. 3 sub-leagues (each state), 2 divisions of five teams per sub-league.

Is it possible for a 1/3 of the schedule to play own division (54 games), 1/3 play within league (54 games) and 1/3 rotating "interleague" between the other two sub-leagues (54 games)?

The math simply doesn't work. (Besides, 3SL is a pain for other reasons.)

Something like this would make sense:

13 games vs. 4 division opponents (52 games)
10 games vs. 5 league opponents (50 games)
3 games vs. 20 "interleague" opponents (60 games)

Could definitely adjust the balance there in a few different ways.

I did learn that the game cannot create a league with 3 sub-leagues. So my request for this kind of schedule is not even possible.

With a custom schedule that wouldn't be an issue though, except for maybe getting the playoffs structured how you want them (even that can be done though by picking playoff teams manually each season). Shouldn't be a problem at all to just put all 30 teams in 1 subleague with six divisions.