The Player’s Tribune, which is owned by Derek, 44, shared the news on its official Twitter account. Hannah previously announced she was expecting the couple's first child on the site.
"Congratulations Derek and Hannah on the birth of your second baby girl, Story Grey Jeter. Welcome to the family, #2,” the tweet read.
The Miami Marlins owner did hint there was a little one on the way in September 2018. While speaking to Extra at his charity event, he was asked if "there were any more in the future." The athlete admitted through a smile, "Yea there's some more, definitely. You're slick I see that."
Story joins big sister Bella Raine, 17 months, in the Jeter party of four.
What do you think of Derek and Hannah's new addition? Let us know in the comments.