Sparky's League has been up and running for 8 seasons now, 2 of which I have been the commissioner.
There are several openings, Yankees, Red Sox, Mets, Expos, Indians, Twins, Astros, A's, Giants, and Padres.
We just switched to a 1972-style league. Doing away with expansion teams, the CENTRAL divisions, no wild card, and no more interleague play. AL uses DH.
It's not a very active league, but a challenge with just 4 teams making the playoffs. Using OOTP 6.5
www.sparkyleague.com