NEW YORK— Ryan Lochte is famous for his laid-back, surfer dude attitude. Maybe too laid-back.

The swimmer, who won four Olympic medals in Beijing, said today that he has twice been cited for missing drug tests. Athletes must keep the U.S. Anti-Doping Agency apprised of their whereabouts at all times; they can be suspended if they can't be located for a test three times in 18 months.

"One more, I'm hurtin'," Lochte said, conceding that he's "horrible" about updating USADA on his travels.

Lochte didn't appear too concerned about his situation — U.S. teammate Natalie Coughlin seemed more alarmed after hearing Lochte talk about it. It was Coughlin who had brought up the challenge of keeping USADA informed as the star swimmers jet around the country following the Olympics.

"I don't know from day to day where I'll be," said Coughlin, who won six medals in Beijing.

On Tuesday, it was the New York Stock Exchange, where she, Lochte and Michael Phelps rang the opening bell. As was the case with this trip, it's not unusual to find out they need to book a flight a day or two in advance.

"You have to be really diligent about giving them your whereabouts 24-7, which is a huge pain in the butt, but it's something that we do," Coughlin said.

Since returning from the Olympics on Aug. 21, Lochte has bounced around from Gainesville, Fla., to Daytona Beach, Fla., back to Gainesville, then on to Chicago, Florida again, and now New York.

Coughlin has been in Chicago, New York, Los Angeles and San Francisco.

Phelps, who broke Mark Spitz's record with eight gold medals, is preparing to host "Saturday Night Live" this week. He will be honored with a parade, music and fireworks in his home state of Maryland on Oct. 4, local officials announced Tuesday.