BS, IMO. There was less than a 50% chance of rain for at least an hour after first pitch. They could have played at least three innings of the game without the likelihood of rain. I don't remember that game EVER being cancelled, even when temperatures have been really low. Or if it was cancelled, it was a number of years ago.
This game had been cancelled a number of times. In fact, the Alumni Game is synonymous with **** weather.