Because Tab Hunter sold his soul to Ray Walston so the Senators would beat those damn Yankees.
Plus he got to make out with Gwen Verdon.
Also, Walter "Big Train" Johnson and Harmon Killabrew were Washington Senators.
I really liked to watch that movie when I was a kid. They used to run it all the time on the Million Dollar Movie on Channel 9. Remember that, or are you not old enough?
Tab Hunter may have made out with Gwen Verdon on screen. Off screen, however, I heard that he was more interested in Rock Hudson.