The infant daughter of newly signed Mets catcher Landon Powell died Friday night, the family wrote on their Facebook page, "Prayers for Izzy." Izzy Powell, who was five months old, suffered from Hemophagocytic lymphohistiocytosis, an affliction which causes white bloods to build up in an organ and destroy other cells. The family wrote that her liver grew so much it caused her ribs to break. "She fought until the end and squeezed my hand tight until she left," Landon Powell and his wife Allyson wrote on the social media site. "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."