michaelphelps062216.jpg
Michael Phelps is entered in five events at the Olympic trials. USATSI

Michael Phelps has been waiting four years to add to his Olympic-record medal total, and the trials are the next step towards Rio.

Phelps has entered five events at the U.S. Olympic Swimming Trials, which begin Sunday in Omaha. In addition to his three signature events (100m and 200m butterflies, 200m individual medley), he has entered the 100m and 200m freestyles.

While Phelps isn't expected to qualify individually in the freestyle events, a strong time could make his case for selection on the 4x100m and 4x200m relay teams in Rio.

Phelps has won 22 Olympic medals -- including 18 golds -- both of which are records.

The list of entrants was made public Wednesday by USA Swimming.

Eleven-time Olympic medalist Ryan Lochte will swim six events: the 100m and 200m freestyles, 200m backstroke, 100m butterfly and the 200m and 400m individual medleys.

Decorated Olympians Missy Franklin and Katie Ledecky are entered in four and six events, respectively.

Swimmers can back out of events if they choose, but cannot enter events for which they weren't previously listed.

Wink of the CBS eye to NBC Sports