Keller was a member of the USA swim group for three of the Olympic video games from 2000 to 2008, throughout which he gained 5 medals. He earned two gold medals when he participated within the 800 meter free relay with teammates Michael Phelps, Ryan Lochte and Peter Vanderkaay on the 2004 Athens and 2008 Beijing Olympics. The 2004 relay has since been named the Race of the Century.
Following his time on the Olympic group, Keller confronted adversity in his private life, having divorced his spouse in 2014.
In 2018, he informed USA Swimming that he struggled to pay baby help and lived out of his Ford Fusion, explaining, “I did not know the place to go, as a result of I did not actually have anyplace to go, so I simply traveled to see crucial folks in my life, on the lookout for recommendation and course.”
“Inside a matter of some years, I went from Olympic gold medalist to husband, home-owner, man with a sequence of gross sales jobs—life insurance coverage, software program, medical units, monetary merchandise—and father of three, and I had a very tough time accepting who I used to be with out swimming in my life,” he informed the group on the time. “Swimmer had been my identification for many of my life, after which I rapidly transitioned to different roles and by no means gave myself time to get comfy with them. I actually struggled with issues. I did not take pleasure in my work, and that unhappiness and lack of identification began creeping into my marriage.”