I first met T.J. Rush, “Sonny,” in the late 1970s. It was a Tuesday night at a Long Beach, Calif., nightclub. Sonny stood tall and proud in his uniform with a chest full of medals. He had stopped in to see the entertainer after practicing with the Barbershop Quartet of America. He had grown up with the entertainer whose name was Del Nadeau. In high school, they belonged to a barbershop quartet. After graduation they went their separate ways. Sonny joined the Marines and Del played minor league baseball until calcium deposits sidelined his pitching arm. Sonny spent almost 30 …