Complex sentence: Four of their films have featured Billy Crystal, two have featured Tom Hanks, and two are about baseball, a favorite subject of Ganz's, as he is a passionate and lifelong fan of the New York Mets.
Split into simpler sentences: Four of their films have featured Billy Crystal, and two have featured Tom Hanks. Two are about baseball, a favorite subject of Ganz, a passionate fan of the New York Mets.