It's a little hard to imagine now, but there was a time when rock ’n’ roll musicians had to make up their musical approaches from scratch. The great rock drummer D.J. Fontana started out in his native Shreveport, La., as staff skinsman for the Louisiana Hayride radio show, and joined Elvis Presley's group, The Blue Moon Boys, in 1955. Inspired by the big-band drummers of the 1940s, Fontana developed an aggressive but never obtrusive style that worked perfectly for Presley — that's Fontana on such rock ’n’ roll templates as "Hound Dog" and "Jailhouse Rock." Fontana continued to play with Elvis through the ’50s, and rejoined the King for his epochal 1968 comeback TV special. Ensconced in Nashville as a session musician, Fontana recorded with many big names in the '60s and '70s, and he shows little indication of slowing down after turning 80 earlier this year.