O'Hearn: 'It means the world' to hit a grand slam in front of friends and family

Whit Merrifield on the Royals' offense, which put up 12 runs against a first-place Astros team on Tuesday night: "We're really good, and we've got some guys like O'Hearn that are starting to catch their stride."

Major League Baseball Whit Merrifield Kansas City Royals