He won the 1993 U.S. title in the 400 m, and followed it with world titles in both the 400 m and 4 × 400 m relay. His 42.91 second split time in the 4 × 400 m relay remains the fastest 400 metres in history. At the 1995 World Championships in Gothenburg, Johnson won his first 200 m and 400 m "double". No elite-level male track athlete had accomplished this in a major meet in the 20th century. At the end he made it a "triple" by adding another title in the 4 × 400 m relay.