Rossi plays catch with his grandson Kai, exclaiming at the end "Cubs win! Cubs win!" and Kai's father walks up to them, saying "Now that you've won the world series...." In real life, the Chicago Cubs would go on to win the world series on November 3, 2016.
The framed photo that Rossi picks up of Joy is from Anonymous (2015), in front of the New Directions building.