Richard J. Pratt, Sr. age 86, of Waltham, passed away on Thursday August 15, 2019. Beloved husband of Charlotte (Vasquezi) Pratt. Loving father of Diane Nardone & her husband Doug, Susan Gardner & her husband Mark, Richard J. Pratt, Jr., David Pratt & his wife Sue and the late Mary Frazier & her husband Thomas. Cherished "Papa" to 10 grandchildren and 10 great-grandchildren. Burial will be private.