In August 2008, rumors spread that Michael was seeing Australian swimmer Stephanie Rice. The two were reportedly spotted kissing during the 2008 Summer Olympics in Beijing, per the New York Post.
A month after (maybe) kissing Stephanie, Michael reportedly began romancing Caroline Pal, who at the time was working as a waitress at the Palms Casino Resort's Moon Nightclub.
Controversial former Miss California Carrie Prejean was first linked to Michael in April 2009, and not long after, Carrie's grandmother confirmed the relationship during an interview with Radar Online.
In November 2010, Michael began stepping out with socialite Brittny Gastineau, and a source for People confirmed the budding romance. "It's just started.
Megan Rossee
Michael's first major relationship in the spotlight was with model Megan Rossee, and though the two weren't linked until August 2012 — which is when they made their red carpet debut at a Speedo event — a source for E! News claimed the two started dating five months before that.
Win McMurry
The swimmer turned heads when he arrived at the 2013 ESPY Awards with Golf Channel reporter Win McMurry, and it wasn't long before a source for Us Weekly confirmed the two were an item.