RYAN UTSUMI, 41, had been drenched in the turquoise blue and calm of southern California pools since he started swimming competitively at age five. “But in 2001, after 15 years of chlorine and coaches on the pool deck, I was done with all that,” he says.
What the investment-management professional didn't know was that he wasn't done with swimming. Ten years later, a move to San Francisco gave him access to the bay, “and I started picking up
