Complex sentence: The Baysox advanced to their first Eastern League Championship Series in team history in 2015 with a 3-1 series win against the Altoona Curve, and went on to win their first Eastern League crown, with a 3-2 series win against Reading.
Split into simpler sentences: The Baysox advanced to their first Eastern League Championship Series in team history in 2015 with a 3-1 series win against the Altoona Curve. Bowie went on to win their first Eastern League crown that year, with a 3-2 series win against Reading.