Phelps locks up another 8-race program in London - CBS Atlanta 46

Michael Phelps has earned a chance to swim eight Olympic races, rallying to win the 100-meter butterfly at the U.S. trials.

Phelps was slow off the blocks and made the turn in sixth place Sunday night. But he caught Tyler McGill on the return lap and surged to the wall to win 51.14 seconds, well off his world-record pace (49.82) but fastest in the world this year.

McGill hung on for the second Olympic spot in 51.32. Ryan Lochte, swimming an event he normally doesn't in major competitions, just missed adding another race to his already busy program. He was third, 33-hundreths behind McGill.

Phelps, who set an Olympic record with eight gold medals at the 2008 Beijing Games, is expected to swim the same eight events in London.

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