Michael Duane Johnson (born in September 13, 1967), Dallas, Texas is an American retired sprinter. He is widely considered the greatest long sprinter of all time. During his time on the track, he established world records for the 400 m (43.18 Seville, Spain), indoor 400 m, indoor 300 m, 200 m, and 4 × 400 m relay. Due to these achievements, and due to the vast difference between the 200 m and 400 m, Johnson left little doubt that he is the greatest sprinter of all time. He won four Olympic gold medals and eight World Championships gold medals.