Complex sentence: The Blue Jays, an expansion team in 1977, did not have a AA team affiliated with their club that season, sent Byrd to the Cleveland Indians AA team in the Eastern League, the Jersey City Indians.
Split into simpler sentences: The Blue Jays, an expansion team in 1977, did not have a AA team affiliated with their club that season. Instead, they sent Byrd to the Cleveland Indians AA team in the Eastern League, the Jersey City Indians.