Both Hogan and Hart had previous musical experience. Hogan was discovered while playing bass at a club before being brought into the world of professional wrestling. Hart, who provides vocals for more than half the band's songs, was heralded by many in the business prior to the album's release for his legitimate musical talent, Jimmy Hart was also a founding member of The Gentrys, a 1960s band who produced one major hit before touring with The Beach Boys and Sonny and Cher.
Hulk Rules includes songs in the genres of rock, pop, rap and other genres.
The song "American Made" was used as Hogan's theme song in World Championship Wrestling for a while. According to Hogan, "Hulkster in Heaven" was written in 1992 in honor of a Make-A-Wish Kid whom Hogan had invited to sit ringside at a show in the UK. When Hulk went out to wrestle, he saw that the seat was empty. Later, he was informed that the child had died before the match had begun. The lyric "Guess there'll be an empty seat when I wrestle at Wembley," was direct result of the situation. Proceeds from the album went to help the young boy's family, who was having trouble paying the medical bills.That night, Hogan and Jimmy Hart wrote several songs for the album. Hogan let his wife Linda sing back up vocals on a couple of the songs because, according to him, she sounded better than "the rest of the stuff."