Masters, Peter J. of Bedford, formerly of Lexington, June 5, 2017. Husband of Karolyn (Seidelmann) Masters. Father of Peter J. Masters Jr. and his wife Amy of Bedford, Christopher J. Masters and his wife Genny of Hopkinton, Kristine M. Masters of Rome, Italy, and Katy L. O'Connor and her husband Kyle of Bedford. Brother of James Mastrocola of Westford, and Janice Mastrocola of Charlestown. Peter is also survived by 12 grandchildren, Jackson, Alexa, Landon, Sadie, Chase, Annie, Charlotte, Bridget, Kierstyn, Emma, Paige, and Christian, and by many nieces and nephews. U.S. Air Force Veteran; Prior to retirement owner of Data National Computer Service in Burlington. Visiting hours will be held Sunday June 11 at the Douglass Funeral Home, 51 Worthen Rd. Lexington from 4pm to 7pm, and a Funeral Service will be celebrated Monday June 12 at Grace Chapel, 59 Worthen Rd. Lexington at 11am. Relatives and friends are kindly invited. Donations in his memory may be made to the American Heart Association, 20 Speen St. Framingham, MA 01701. Interment private.