Wait, seriously!? I thought it was just going to be the Nationals refunding you the face value of the ticket. Do you know where I can find the pages/documents where Stubhub states they'll refund your tickets?
I bet you can take any game ticket to the Nats and get a refund if you bought it on the secondary market. And if you click on any playoff game tickets on SH, the below pops up:
Before you purchase tickets to this playoff game, keep in mind that:
If this game does take place, your tickets will be delivered electronically 48 hours before the event. We will let you know when your tickets are available.
If the game is not played, you will automatically receive a refund within 48 hours of the event being cancelled, including any service or shipping fees.