Mike & Mike congratulate the Jeters on their impending new addition and joke about Derek's chances of being able to choose his daughter's name. (1:41)

The Captain will soon go by a new nickname: Dad.

Derek Jeter and his wife Hannah announced Monday that they are expecting their first child.

Hannah Jeter, in a column published on her husband's The Players' Tribune website, wrote that she is pregnant with a baby girl.

Hannah and Derek Jeter share their next chapter: https://t.co/ZY6aDhRQH6 pic.twitter.com/5heb7MTobQ — The Players' Tribune (@PlayersTribune) February 13, 2017

Hannah, who didn't reveal how far along she is in her pregnancy, also wrote that Derek "already has a name in mind," but that she isn't sold on the former Yankees star's choice.

"He already has a name in mind -- he's set on it," Hannah wrote. "[We'll see.] He'll say when he calls me during the day: 'So, how are you and so-and-so doing?'

"'That's not the name yet, sweetie.' Whatever her name is, I know she'll run circles around him."

Derek, 42, and Hannah, 26, were married last July, less than two years after the 14-time All-Star retired from baseball. Jeter won five World Series titles and finished his 20-year career as the Yankees' all-time leader with 3,465 hits.