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.

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 ...

The Washington Nationals used their bark at the park promotion to call up Bruce the Bat Dog from Triple-A Rochester.

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.

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.

The dog days of summer arrived Saturday at Nationals Park.Bruce, a 21-month-old golden retriever, fetched a bat during a ceremony Saturday before the Washington Nationals' 4-3 loss to the Miami ...

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