Complex sentence: However, the Norris Division was so weak that year (only the Red Wings finished with a winning record) that the Leafs actually made the playoffs, beating the Stars on the last day of the season to secure the final playoff spot from the division.
Split into simpler sentences: However, the Norris Division was so weak that year (only the Red Wings finished with a winning record) that the Leafs and Stars were actually still in playoff contention on the last day of the season. The Leafs defeated the Stars in the final game of the regular season to secure the final playoff spot from the division.