OMAHA — Not that Missy Franklin needed a reminder of the perils that can befall a reigning Olympic champion at the U.S. trials, but she got one Sunday night when Ryan Lochte was upset in the first finals race of the eight-day event. Lochte, a five-time Olympic champion who won the 400-meter individual medley at the 2012 London Games, failed to make the team in that event Sunday after he pulled a groin muscle in his morning heat and limped to third place in the evening session.