[6] Plummer shattered the old mark set by Glenn Davis five years previously by the huge margin of 8 tenths of a second.

[10] In 1964, Plummer attempted to qualify for the Olympic Games but trailed in his heat due to the flare-up of an arthritic knee, a condition that was to eventually end his athletics career.

[15] Plummer was a native of Brooklyn, New York City and served in the United States Air Force before attending UNM.

In the mid-1970s (1974–76 in particular), Plummer's tenure as an educator at Cole Junior H.S., in Denver, coincided with the earliest days of Court-Ordered Busing for Integration.

His involvement was instrumental in fostering tolerance – resulting in a successful, peaceful learning environment for Denver's suburban and urban students suddenly exposed to new cohorts and lifestyles and attitudes.