Phelps and and his wife, Nicole, welcomed their second child this week as the Winter Olympics continued half a world away — perfect timing for the son of the most decorated Olympian of all time. Their oldest son, Boomer, was born in May 2016."Magical moments yesterday … Nicole and I would like to introduce Beckett Richard Phelps to the world!," Phelps posted on Instagram on Tuesday, accompanied by a picture of his wife and two sons."We had a healthy baby boy and a healthy mama. I truly do feel like the happiest man in the world."His wife said she is "surrounded by boys and I couldn't be happier." Beckett's big brother also took to social media to pay tribute to the newest addition. "I am officially a big bro!!! All I wanna do is hold him! I can't wait til I get to teach him so many cool things about the world!," Boomer, um, his Instagram ghostwriter posted. The couple got engaged in February 2015, and tied the knot at a secret wedding the following year.