Complex sentence: Joe Sakic is the franchise leader in goals, assists and points, and while he is the eight player in franchise history to do so, he is the only player to serve as the captain of the team in Colorado.
Split into simpler sentences: Joe Sakic is the franchise leader in goals, assists and points, and is the eighth player in franchise history to do so. He is the only player to have served as the captain of the team in Colorado.