OMAHA, Neb. (AP) — Michael Phelps swam the world's fastest 100-meter butterfly of the year Friday, and he thought he could have done even better. Phelps finished in 51.04 seconds at the Mutual of Omaha Swimvitational, beating world record-holder Ian Crocker's previous 2008 best of 51.32, which Crocker recorded in Austin, Texas, in March. "I really wanted to break 51 in the 100 fly, but my finish kind of wasn't too good," Phelps said.