Michael Phelps at 2015 U.S. national championships

Michael Phelps acknowledges the crowd as he celebrates his win in the finals of the men’s 200-meter individual medley at the the U.S. swimming nationals.

(Eric Gay / Associated Press)

Baltimore Sun

Aug. 9, 2015 6:58 PM PT

Pictures of swimmer Michael Phelps at the 2015 U.S. national championships.

Michael Phelps slams his fist on the water as he celebrates his win in the finals of the men’s 200-meter individual medley at the the U.S. swimming nationals.

(Eric Gay / Associated Press)

Michael Phelps celebrates his win in the finals of the men’s 200-meter individual medley at the the U.S. swimming nationals.

(Eric Gay / Associated Press)

Michael Phelps competes in the finals of the men’s 200-meter individual medley at the the U.S. swimming nationals.

(Eric Gay / Associated Press)

Michael Phelps competes in the finals of the men’s 200-meter individual medley at the the U.S. swimming nationals.

(Eric Gay / Associated Press)

Michael Phelps celebrates his win in the finals of the men’s 200-meter individual medley at the the U.S. swimming nationals.

(Eric Gay / Associated Press)

Michael Phelps competes in the finals of the men’s 200-meter individual medley at the the U.S. swimming nationals.

(Eric Gay / Associated Press)

Michael Phelps competes in the men’s 200-meter IM final during the 2015 Phillips 66 National Championships at the Northside Swim Center.

(Ronald Martinez / Getty Images)

Michael Phelps competes in the Men’s 200 Meter IM final during the 2015 Phillips 66 National Championships at the Northside Swim Center.

(Ronald Martinez / Getty Images)

Michael Phelps prepares to compete in the Men’s 200-meter IM final during the 2015 Phillips 66 National Championships at the Northside Swim Center.

(Ronald Martinez / Getty Images)

Michael Phelps does a TV interview after competing in the Men’s 200-meter IM final during the 2015 Phillips 66 National Championships at the Northside Swim Center.

(Ronald Martinez / Getty Images)