Complex sentence: In Game 1, he threw a shutout, striking out seventeen batters, besting Sandy Koufax's 1963 record by two, and it still stands as the World Series record today.
Split into simpler sentences: In Game 1, he threw a shutout, striking out a Series record 17 batters, besting Sandy Koufax's 1963 record by two. The 17 strikeouts still stands as the World Series record today.