The dog days of summer arrived Saturday at Nationals Park. Bruce, a 21-month-old golden retriever, fetched a bat during a ceremony before the Washington Nationals-Miami Marlins game.

The dog days of summer arrived Saturday at Nationals Park. Bruce, a 21-month-old Golden Retriever, fetched a bat during a ceremony before the Washington Nationals’ game against the Miami Marlins ...

MLB rules don’t specify that a dog can’t play baseball. The Nationals won’t be testing that, even as they called up Bruce the Bat Dog on Tuesday afternoon.

Bruce, wearing a bandana with an "MLB debut" patch he received when he arrived at the stadium, was presented a commemorative bat.

Bruce, wearing a bandana with an "MLB debut" patch he received when he arrived at the stadium, was presented a commemorative bat.

Bruce, wearing a bandana with an "MLB debut" patch he received when he arrived at the stadium, was presented a commemorative bat.

Bruce, wearing a bandana with an "MLB debut" patch he received when he arrived at the stadium, was presented a commemorative bat.

Nationals' bat-retrieving dog Bruce laps up pregame attention, makes MLB debut The dog days of summer arrived at Nationals Park ...