On Monday, swimming great Michael Phelps is set to return from the six-month suspension he received from USA Swimming after he was arrested on a drunken-driving charge in late September.

According to the Baltimore Sun, the 18-time Olympic gold medalist will race at the Arena Pro Swim Series event in Mesa, Ariz., which begins April 15. Earlier this month, ESPN reported that Phelps could find a spot on the U.S. team at this summer’s world championships in Russia after USA Swimming officials originally said he would not be allowed on the team when his suspension was announced. A USA Swimming spokesperson has since said that the reports on Phelps’s possible participation in the world championships were “a bit misconstrued.”

Phelps has qualified for three individual events at the world championships but does not need to participate to earn a spot on the 2016 U.S. Olympic team.

In December, Phelps pleaded guilty to the DUI charge — his second in 10 years — in a Baltimore court. He received a one-year suspended sentence and 18 months of supervised probation, which is still in effect.

Phelps took part in a rehab program after his arrest and suspension. He also got engaged to his longtime girlfriend.