The spoof is wrapped around the 1989 film, Field of Dreams . If you haven't seen the film, I'm too lazy to explain the plot to you. That's the kind of mood I'm in, today. Go to Netflix, maybe they have it available for streaming.
Lots of high profile sports and Hollywood celebrities feature prominently. Watch it. It's worth three minutes of your time. And even if it isn't...well, it's only three minutes of your time.