Harper struck out with the blue bat. He resumed swinging his regular bat for the rest of the game and finished 1 for 5. "I think he would have been excited either way," Turner said.

Harper struck out with the blue bat. He resumed swinging his regular bat for the rest of the game and finished 1 for 5. “I think he would have been excited either way,” Turner said.

I ended up handing him the blue one and he was pretty happy.” Harper struck out with the blue bat. He resumed swinging his regular bat for the rest of the game and finished 1 for 5.

That's because with a baby blue bat, Harper revealed to the fans in the stadium -- and all around the world -- that the baby he is expecting with his wife, Kayla, will be a boy.

Sadly, Harper struck out with his custom blue bat, but it was hard to ruin such a heartwarming moment. He went 1-for-5 at the plate in Monday's 10-4 loss to the Giants.

The Philadelphia Phillies star had the gender of his fourth child revealed to him with the baseball bat he used in his team’s game against the San Francisco Giants at Citizens Bank Park.