The Oakland Athletics have had 20 chances over the last three years to promote a Red Sox game with a Deflategate joke. After waiting for the perfect one through 19 games, they've finally done it.
The Red Sox, of course, were not participants in the Deflategate scandal. That was the Patriots, a football team. Oakland has a football team (for now) that actually had a controversial postseason run-in with the Patriots once upon a time, but it would be weird to make a joke years later that isn't topical. Good thing they avoided that.