O'LEARY - Michael S. Of Williamsville, NY, January 20, 2021, at age 86. Beloved husband of Jean A. (Clark) O'Leary; father of Sheila (late Andrew) Adcock of East Amherst, NY, Steven (Jill) O'Leary of Fort Wayne, IN, and Michael (Kim) O'Leary of Medina, OH; grandfather of Sean, Ryan, Keller, and Kaitlin O'Leary, Joseph and Michael Adcock, and Raven and Brody O'Leary; survived by sister Helen Foley and predeceased by Mary K. (John) Girdlestone, Judy (William) Anderson, Patrick O'Leary, and Monica (Larry) Sadoff; brother-in-law of Donald Clark, Mary Gilbert, and the late Evelyn Jewett and Howard Clark; also survived by many nieces and nephews. Mike was a retiree of Fireman's Fund Insurance Company where he served as a Claims Line Manager. He was a past member of the Bison City Rod and Gun Club Pistol Team. Mike volunteered at Millard Fillmore Suburban Hospital and Roswell Park Comprehensive Cancer Center. He was a U.S. Army veteran having served with the 47th Brigade. Mike fought the good fight. He finished the race. He kept the faith! No prior visitation. A memorial service will be held at a later date. In lieu of flowers, donations may be made to Catholic Charities, PO Box 1311, Buffalo, NY 14248 or to the Mercy Hospital Foundation, Palliative Care Unit, 565 Abbott Rd., Buffalo, NY 14220. Arrangements by: ERIE COUNTY CREMATION SERVICE, 824-6435. Please share your condolences at: www.ERIECOUNTYCREMATIONSERVICE.com