Complex sentence: On September 20,2015, David Ortiz hit his 500th career home run off Matt Moore in Tropicana Field becoming the 27th player in MLB history to achieve that prestigious milestone; in November 2015, Ortiz announced that the 2016 season would be his last.
Split into simpler sentences: On September 20,2015, David Ortiz hit his 500th career home run off Matt Moore in Tropicana Field becoming the 27th player in MLB history to achieve that prestigious milestone. The following off-season, Longtime DH David Ortiz announced that the 2016 season would be his last.