New Texas Ranger Jake Burger will wear No. 21 this season. The number is for his daughter, Penelope, who was born with Down syndrome. Down syndrome is also known as trisomy 21, due to an extra copy of the 21st chromosome.

Jake Burger is one of the Texas Rangers’ offseason additions. He explained how his daughter influenced his switch from number from 36 to 21.

The clinical name for Down syndrome is trisomy 21, a condition in which a person is born with an extra chromosome, causing mild to moderate cognitive disability, developmental delays and physical challenges.

Jake Burger is the proud father of a newborn daughter whom he will honor on the field during every game. The new Rangers first baseman announced Friday that he will wear No. 21 to pay tribute to Penelope,