Sunoco Executives Cynthia Archer and Boyd Foster Also Retiring DALLAS, 2017-Jun-24 — /EPR Retail News/ — Sunoco LP (NYSE: SUN) announced today (June 22, 2017) that Robert "Bob" W. Owens, president and chief executive officer has announced his intention to retire from the Partnership as of December 31, 2017, after more than 20 years with Sunoco…