Michael Phelps Is a Dad Welcome, Boomer By Newser Editors, Newser Staff Posted May 8, 2016 6:50 AM CDT 17 comments Comments A 2011 photo of Michael Phelps and girlfriend Nicole Johnson. (AP Photo/Wong Maye-E, File) (Newser) – Michael Phelps will compete in the Rio Olympics with an extra set of eyes upon him: He and fiancee Nicole Johnson are the parents of a baby boy, reports US Weekly. Boomer Robert Phelps came into the world on Thursday, and Phelps shared on Instagram photo on Saturday. "Healthy and happy!!!! Best feeling I have ever felt in my life!!!” writes the 22-time Olympic medalist in the caption. Phelps, 30, plans to retire from swimming after the Rio Games in August, notes CNN.