Complex sentence: He rushed for over 1,000 yards twice in his career, once with the Oilers during the 1993 season with 1,002 yards, and once with the New York Giants during the 1998 season with 1,063 yards.
Split into simpler sentences: He rushed for over 1,000 yards twice in his career. He did it with the Oilers during the 1993 season with 1,002 yards and with the New York Giants during the 1998 season with 1,063 yards.