Dana Vollmer

Michael Phelps jumps into gene pool, becomes 1st-time father

Michael Phelps is a first-time father.

The 18-time Olympic gold medalist and fiancee Nicole Johnson welcomed Boomer Robert Phelps on Thursday night in Arizona, where Phelps has been training in preparation for the Rio Olympics.

"Healthy and happy!!! Best feeling I have ever felt in my life!!!" Phelps posted on Instagram on Saturday in announcing his son's name and arrival date and time. A black-and-white photo showed a shirtless Phelps cradling his son and planting a kiss on his head while Johnson looked on from her hospital bed.

Phelps' longtime coach, Bob Bowman, confirmed that the baby's middle name is in his honor, calling it "a big surprise"...