Complex sentence: After a mediocre year in 1951, they lost 84 games in 1952, and after that season, it was decided that any Central League teams ending the season with a winning percentage below.300 would be disbanded or merged with other teams.
Split into simpler sentences: After a mediocre year in 1951, they lost 84 games in 1952. It was decided that any Central League teams ending the season with a winning percentage below.300 would be disbanded or merged with other teams.