He won gold medals in tandem with his teammates at the 4 × 100 m relay at the 1976 Summer Olympics, 1979 and 1987 Pan American Games, and 1987 World Championships.

Glance equaled the then 100 m world record of 9.9 twice in 1976: first on April 3 in Columbia, South Carolina and then a month later in Baton Rouge, Louisiana.

[14][15] At the national level, Glance assumed the following roles: In recognition of his achievements, in 1996 he was inducted into the Alabama Sports Hall of Fame, and, most notably, he received in 2008 the Congressional Gold Medal of Freedom.

[14] Always aware of the importance of public relations and civic responsibility, Glance was a regular visitor as a student to a veterans hospital and was selected as one of five student-athletes from the 1976 Olympics team to be invited to an NCAA Honors Luncheon with the President of the United States.

[20] Glance was ranked among the best in the U.S. and the world in both the 100 and 200 m sprint events over the incredible spread of 12 seasons from 1976 to 1987, according to the votes of the experts of Track & Field News.