He was ranked (see below) in the American top ten at 200 metres five times between 1974 and 1979 including #1 in 1977 and 1978. Worldwide those rankings were not much different, ranking #1 in 1978 and #3 in 1977 behind Mennea and Olympic Champion Don Quarrie. And he was #2 worldwide in 1978 at 100 metres.
Edwards' fastest time over 100 metres was 10.07 seconds, set at Eugene in June 1978. In that year, Edwards achieved the remarkable 'double-double' of winning the 100 and 200 m events at both the NCAA (United State collegiate) and AAU (United States National) Championships. He was the first to do this since Hal Davis in 1943. That same year he also recorded the world's best year performance in the men's 200 metres at the dual meet against cross-town rival UCLA in Westwood, Los Angeles, clocking 20.03 on April 29, 1978. In both 1977 and 1978 he was awarded the Pac-10 Track athlete of the year.
Also in 1978, Edwards ran the anchor leg of a University of Southern California team (with Joel Andrews, James Sanford and William Mullins) that broke the world record in 4x200 m relay event with a time of 1.20.26 at Tempe, Arizona on 27 May. They broke the record even though they came second in the race. The team that won from the Tobias Striders track team was multi-national and so was not eligible to hold the record (that team of Guy Abrahams, Michael Simmons, Don Quarrie and James Gilkes recorded a time of 1.20.23.)
Edwards was ranked among the best in the USA and the world in the 100 yard/100 metre and 200 yard/200 metre sprint events in the period 1974-79, according to the votes of the experts of Track and Field News.