Harry Joseph "Rocky" Rockafeller Jr. (August 26, 1894 – April 5, 1978) was an American college football player, coach, and athletics administrator at Rutgers University.

As of June 1917 he was a first lieutenant in the infantry assigned as a student at the Fort Myer Camp in Virginia.

In December 1930, Rockafeller asked the Council of Athletics to release him from consideration as the head coach for the 1931 team.

Rockafeller chose to return to his position as Rutgers' graduate manager of athletics.

As coach of the 150-pound football team, he brought two successive championships to Rutgers in League competition; in 1939 he was given the University Award 'for faithful and unselfish service.'

He is our ideal of what a Rutgers man should be: friendly, honest, generous, of kindly heart, and a straight shooter.

His occupation was listed in the census record as the assistant director of athletics at a college.