Complex sentence: He is the first player of Filipino-American descent to hit a grand slam in a World Series game and was the first World Series grand slam since Paul Konerko of the Chicago White Sox in the 2005 World Series.
Split into simpler sentences: He is the first player of Filipino-American descent to hit a grand slam in a World Series game. It was the first World Series grand slam since Paul Konerko of the Chicago White Sox in the 2005 World Series.