Complex sentence: Karosa turned down an opportunity to attend NAPS (Naval Academy Prep School) and the Naval Academy to pursue professional sports, after playing quarterback for the All-Marine football team for two years, helping lead the team to a 20-2 record.
Split into simpler sentences: Karosa turned down an opportunity to attend NAPS (Naval Academy Prep School) and the Naval Academy to pursue professional sports. After playing quarterback for the All-Marine football team for two years, helping lead the team to a 2012 record.