Michael Phelps makes post-retirement debut

Michael Phelps’ retirement only lasted a couple of years before the swimming stud had to get back into the pool. The 22-time Olympic medalist is in Arizona for his first post-retirement competition. Phelps will be competing in three events at the Arena Grand Prix starting Thursday.

Michael Phelps dries off after warm ups prior to competing in the 100-meter butterfly during the Arena Grand Prix, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)

Michael Phelps looks at the scoreboard after the 100-meter butterfly during the Arena Grand Prix swim meet, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)

Michael Phelps competes in the 100-meter butterfly during the Arena Grand Prix swim meet, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)

Michael Phelps warms up prior to competing in the 100-meter butterfly during the Arena Grand Prix, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)

Michael Phelps dries off after warm ups prior to competing in the 100-meter butterfly during the Arena Grand Prix, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)

Michael Phelps dries off after warm ups prior to competing in the 100-meter butterfly during the Arena Grand Prix, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)

Michael Phelps warms up prior to competing in the 100 Butterfly during the Arena Grand Prix at Mesa, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)

Michael Phelps warms up prior to competing in the 100-meter butterfly during the Arena Grand Prix swim meet, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement

Michael Phelps warms up prior to competing in the 100-meter butterfly during the Arena Grand Prix swim meet, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)

Michael Phelps warms up prior to competing in the 100-meter butterfly during the Arena Grand Prix swim meet, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)

Michael Phelps warms up prior to competing in the 100-meter butterfly during the Arena Grand Prix swim meet, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)

Michael Phelps warms up prior to competing in the 100 Butterfly during the Arena Grand Prix at Mesa, Thursday, April 24, 2014, in Mesa, Ariz. It is Phelps' first competitive event after a nearly two-year retirement. (AP Photo/Matt York)