Jenner was the American champion in the men's decathlon event in 1974, and was featured on the cover of Track & Field News magazine's August 1974 issue. While on tour in 1975, Jenner won the French national championship, and a gold medal at the 1975 Pan American Games, earning the tournament record with 8,045 points. This was followed by new world records of 8,524 points at the U.S.A./U.S.S.R./Poland triangular meet in Eugene, Oregon on August 9–10, 1975, breaking Avilov's record, and 8,538 points at the 1976 Olympic trials, also in Eugene. The record in Eugene was a Hybrid score because a timing system failure and wind aided marks. Still, Jenner was proud of “A nice little workout, huh?”