Complex sentence: He enjoyed his career highlight against the New York Yankees in the 1964 World Series, hitting a grand slam in Game 4, off pitcher Al Downing, to give the Cardinals a 4-3 victory.
Split into simpler sentences: He enjoyed his career highlight against the New York Yankees in the 1964 World Series. Boyer hit a grand slam in Game 4, off pitcher Al Downing, to give the Cardinals a 4-3 victory.