Complex sentence: Two days later he recorded his 46th, and two days after that, his 47th and his 48th on September 27 on the final game of the regular season he recorded his 49th, completing his perfect season.
Split into simpler sentences: Two days later he recorded his 46th, and two days after that, his 47th and his 48th on September 27. On the final game of the regular season he recorded his 49th, completing his perfect season.