Major League infielder turns out to be a serial killer who has built a (baseball themed?) dungeon below the basement of his house (or the stadium?) where he tortures and kills his victims - "The Second Basement."
Sequel: "The Third Basement."
I had a dream the other night that there was a Glenn Ganges movie in the works, and I was originally slated to play Glenn, but I was pushing for Colin Hanks. The plot of the movie was based on an original script: One day Glenn is surprised to discover a door he had never noticed before in the basement of his house, which leads to another basement below, and another, etc.