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The Indy Grand Prix @ the Nat - Day 2

INDIANAPOLIS, IN - MARCH 30: Nick Thoman swims in the men's 200 meter backstroke finals finals during day two of the Indy Grand Prix @ the Nat at the Indiana University Natatorium on March 30, 2012 in Indianapolis, Indiana. (Photo by Dilip Vishwanat/Getty Images)

Phelps shines at Indy Grand Prix

Michael Phelps notched the third-fastest 400m medley time of the year at the Indianapolis Grand Prix on March 30 -- raising the prospect he could reprise his Olympic challenge in the event.