Complex sentence: Citi Field opened with a night game on April 13 as the Mets hosted the San Diego Padres losing 6--5; three days later, the Cleveland Indians inaugurated New Yankee Stadium against the Bronx Bombers.
Split into simpler sentences: Citi Field opened with a night game on April 13 as the Mets hosted the San Diego Padres losing 6--5. Three days later, the Cleveland Indians inaugurated New Yankee Stadium against the Bronx Bombers.