On the OOTP23 Fictional Sims forum, I had a running history of my four division Promotion/Relegation league, the
North American Baseball Federation. The league features 48 teams from the US, Canada, Mexico, and Cuba, split evenly into Divisions 1-4, with each division having an Eastern and Western Conference, largely divided by the Mississippi River. D1 began with the largest markets, and it got smaller from there, until we got to D4. Each team was given the name of a defunct former team in that city, either from MLB history (such as the Montreal Expos), Negro Leagues history (Detroit Stars), Federal League history (the Chicago Whales), Mexican League history (the Tijuana Potros), or Minor League history (El Paso Sun Kings). There are a few cases where the best or only one I could find is either still active (like the San Antonio Missions) or a new team that revived an old name (like the former PCL LA Angels or San Diego Padres), but close enough.
Promotion or Relegation was determined using a formula based on winning percentage, Conference titles, and Division Championships, over three year cycles. Whichever team from each Conference had the highest number of points over that three year span got promoted; the team with the worst showing got relegated.
I started that thread after simming 30 years (ten cycles) of NABF history, and most of the first couple pages there are devoted to that history, including a comprehensive ranking of all 48 teams as of 2036 (the end of the Federation's 30th year). After that I started in on Cycle 11, and was in the middle of chronicling the 2039 season when I lost steam, got too busy to continue, and hemmed and hawed for a while over whether to switch it over to OOTP 24.
I finally did so after finishing off Cycle 11 and the 2039 season, so I've decided to reopen this story on the forums and see how things progress as we head into Cycle 12. The link in the first paragraph of this will take you to that old thread, or you can just jump on board here as I start with a 2039 recap and then move forward into Cycle 12.