The five-month-old daughter of Mets catcher Landon Powell died Friday night.

Izzy Powell suffered from Hemophagocytic lymphohistiocytosis, a disease in which white blood cells can build up in an organ and destroy other cells.

She leaves behind a twin sister as well as an older brother.

"She fought until the end and squeezed my hand tight until she left," parents Allyson and Landon Powell wrote on Facebook. "My heart is broken, but I am blessed to know she is healthy and whole in heaven. I like to think she is twirling around and singing."