By 1964, Presley's version of "Hound Dog" had been covered over 26 times, and by 1984, there were at least 85 different cover versions of the song, making it "the best-known and most often recorded Rock & Roll song". In July 2013 the official Leiber & Stoller website listed 266 different versions of "Hound Dog", but acknowledged that its list is incomplete. Among the notable artists who have covered Presley's version of "Hound Dog" are: Gene Vincent and His Blue Caps; Jerry Lee Lewis; Chubby Checker; Pat Boone; Sammy Davis, Jr.; Betty Everett; Little Richard; The Surfaris; the Everly Brothers; Junior Wells; the Mothers of Invention; The Easybeats; Jimi Hendrix; Vanilla Fudge; Van Morrison; Conway Twitty; John Lennon and the Plastic Ono Elephant's Memory Band; John Entwistle; Carl Perkins; Eric Clapton; James Taylor; and (in 1993) Tiny Tim (in his full baritone voice). In 1999 David Grisman, John Hartford, and Mike Seeger included "Hound Dawg" on their 1999 album "Retrograss", which was nominated for a Grammy in the Traditional Folk Album category in 2000.