This collection reflects Hennessy's coaching career and his efforts to promote the sport of trampoline. It contains information on his USL squads and results of many of the meets in which they participated. The collection also has records reflecting Hennessy's involvement in international organizations.

There is a good deal of material on Hennessy's most successful pupils: Frank Schmitz, Wayne Miller, Leigh Hennessy, and Judi Ann Ford. Ms. Ford reigned as Miss America from 1968-1969.

Jeff Hennessy donated the collection.