Jack William Lietz, aged 68 of Kentwood, passed away peacefully on Monday, May 29, 2017. He was preceded in death by his parents, William and Eleanor Lietz.  He is survived by his wife of 32 years, Kim; sons, Brandon (Heidi) Lietz, Damen Lietz; grandsons, Oliver and Liam; many aunts, uncles and cousins.  Jack proudly served his country in the US Navy during Vietnam.  He retired from the US Postal Service after 30 years.  He was an avid Detroit sports fan.  Funeral services for Jack will be held Friday at 11:00 am at the Matthysse Kuiper DeGraaf Chapel (Kentwood), 4646 Kalamazoo Ave. with visitation from 10-11 am.  Memorial contributions may be given to a charity of one’s choice.