OMAHA, Neb.—Olympic champion Ryan Lochte failed to advance from the preliminaries of the 200-meter freestyle on Monday, his first event of the U.S. Olympic swimming trials. The 36-year-old Lochte, attempting to make his fifth Olympic team, posted a time of 1 minute, 49.23 seconds—only good enough for 25th place overall. The top 16 advanced to the evening semifinals, led by Kieran Smith at 1:46.54. Caeleb Dressel was second in 1:46.63. Smith won the 400 free on Sunday to earn his first trip to the Olympics. Lochte was also entered Monday in the 100 backstroke, but he scratched that event. Defending Olympic champion Ryan Murphy easily advanced from the preliminaries, as did 36-year-old Matt Grevers, the 2012 gold medalist. Even though Lochte initially entered six events at the trials, it appears the 200 individual medley is the only race in which he has any realistic shot of earning a trip to …