Greg H. Diehl, 52, of Prospect lost his battle with leukemia on Saturday, August 21, 2021. He was born in Butler on May 20, 1969 to the late Stephen Diehl and Nancy (Bennett) Diehl. Greg worked as a master carpenter for the John J. Corcoran Construction Co. for over 2 decades. His hobbies included quads, dirt bikes, side by sides, camping, outdoors, and woodworking. Greg is survived by the love of his life Jessica Milligan along with Savannah, Kaylee, and Aaron. Also survived by his sister Stephanie (Jack) Russell; his nephews Jack and Casey; and a large and loving family. Friends will be received from 6 to 8 pm on Friday, August 27, 2021 at the SPENCER D. GEIBEL FUNERAL HOME & CREMATION SERVICES, 140 NEW CASTLE RD, BUTLER, PA 16001, WWW.SPENCERDGEIBEL.COM. A memory service will immediately follow in the funeral home.