The daughter of former Mets and Yankees infielder John Olerud has died following a lifelong battle with a rare chromosome disorder, according to Mets vice president of alumni relations Jay Horwitz.

Jordan Olerud was 19 years old.

A fund was created in Jordan’s name by her parents in 2003, and The Jordan Fund’s mission is to “provide support to special needs children and their families,” according to its website. ​

Jordan had an extra second chromosome and was missing part of her fifth chromosome. Both the Mets and Yankees sent their condolences Sunday to the Olerud family.

John spent three seasons with the Mets (1997-99) and one with the Yankees (2004) as part of a 17-year career that saw the two-time All-Star first baseman win two World Series with the Blue Jays.

With the Mets, John was part of the famous 1999 Sports Illustrated cover featuring “The Best Infield Ever,” alongside Edgardo Alfonzo, Robin Ventura, and Rey Ordonez.

Jordan is survived by her parents, sister Jessica and brother Garrett.