Ryan Lochte, 28, an 11-time Olympic medalist, withdrew from the meet on Saturday because of illness.
Lochte, who has made several post-Olympic appearances and recently finished an upcoming reality show, called "What Would Ryan Lochte Do?" which makes its debut on the E channel on April 21.
"He just hasn't been feeling that well," said his coach, Mike Harden, who is an assistant coach at the University of Florida. "Ryan's had a lot on his plate. He's been very busy and needed some rest."
Lochte declared a false start for his men's 100-meter backstroke and men's 200-meter IM events on Saturday, and also withdrew from Sunday's 200-meter backstroke and 100-meter freestyle events.
Lochte, who is scheduled to compete in the Mesa Grand Prix in Phoenix, Ariz., April 11-14, finished second in both of his events on Friday night. He was second in the 200-meter freestyle, with a 1:51.82 clocking, and second in the 100-meter butterfly with a 55.20 time.
"Those performances were right where he is when he is in heavy training," Harden said. "He is going to try and get in a training session [Sunday].