4 sim Baseball leagues have openings.
Professional Baseball Alliance's (PBA)
All 3 20th CBS Leagues use only players,stats,teams,stadiums and park effects from the season their currently playing.
20th Century Baseball Stars of 1979,
20th century Baseball Stars of 1999
20th Century Baseball stars of 1959
The Greatest Decade ( 12 teams/decades - 1800's - 2000's)
You must join Pennantchase (Free) then go to the Join League Forum to the Custom League Section.You can browse and join all 4 PBA leagues here.My Pennantchase ID is (lvillano)