What is Moundball?
It's the third out of an inning. Players are running into the dugout. Fans are running to the bathrooms. But where does the ball go? Play along to find out and win some cool prizes.
FOLLOW TO PLAY ALONG:
We’re celebrating Friday with some #Moundball! Follow @MoundballMLB during the MIL-BOS game at 2pm ET. Rules: