Little is known about forward Jack Dinn, who started the first three games of the 1914-15 season but did not return to the lineup following a road trip to New York. Of his play, the Washington Post said Dinn looked the best of the 1915 newcomers but did not report on his departure from the team.

A 1917 graduate of the Dental School, Dinn practiced dentistry in his home town of North Adams, MA for many years.