Complex sentence: With the Giants' victory over the Kansas City Royals to secure the 2014 World Series title, Petit became the only professional baseball player to win both the Little League World Series and the MLB World Series.
Split into simpler sentences: With the Giants' victory over the Kansas City Royals to secure the 2014 World Series title, Petit won his second world championship. He also became the only professional baseball player to win both the Little League World Series and the MLB World Series.