Complex sentence: MLS announced in January 2002 that it had decided to contract the Tampa Bay Mutiny and Miami Fusion, leaving the league with 10 teams--the same number as when MLS began.
Split into simpler sentences: MLS announced in January 2002 that it had decided to contract the Tampa Bay Mutiny and Miami Fusion. This left the league with 10 teams, the same number as when MLS began.