Summary:
Michael Phelps will compete in four events at next week's US National Championships, which will determine the American team for next year's world swimming championships in Sydney.

Full article:
By . Paul Newberry . Olympic legend Michael Phelps has entered four events at next week's US National Championships. Less than four months after coming out of retirement, Phelps will compete in the 100-meter freestyle, 100 butterfly, 100 freestyle and 200 individual medley at the meet in Irvine, California. The national championships, along with the Pan Pacific Championships in Australia a couple of weeks later, will determine the American team for next year's world championships. Comeback trail: Michael Phelps has entered four events for next week's US Championships . Prize guy: Phelps is the most decorated Olympian of all time with 22 medals . The 29-year-old Phelps is the most decorated Olympic athlete with 18 gold medals and 22 medals overall. He retired after the London Games, having accomplished all his goals and saying he had no desire to swim into his 30s. But he began plotting a comeback less than a year later. Since returning, he has competed in four meets. Back with a bang: Phelps recorded a comfortable victory over rival Ryan Lochte in 100m butterfly in July .