Fans have been flocking to Nationals Park this season, starting with Gavin Kearney, 4, holding the hand of his father, Gus, at the April 3 exhibition game against Boston. (Andrew Harnik/The Washington Times)

Fans have been flocking to Nationals Park this season, starting with Gavin Kearney, 4, holding the hand of his father, Gus, at the April 3 exhibition game against Boston. (Andrew Harnik/The Washington Times)