Bio from ALLMUSIC:
Upon the release of their first album in the late ’70s, Tom Petty & the Heartbreakers were shoehorned into the punk/new wave movement by some observers who picked up on the tough, vibrant energy of the group’s blend of Byrds riffs and Stonesy swagger. In a way, the categorization made sense. Compared to the heavy metal and art rock that dominated mid-’70s guitar rock, the Heartbreakers’ bracing return to roots was nearly as unexpected as the crashing chords of the Clash.
The Heartbreakers were a tight, muscular, and versatile backing band that provided the proper support for Petty’s songs, which cataloged a series of middle-class losers and dreamers. While his slurred, nasal voice may have resembled Dylan and Roger McGuinn, Petty’s songwriting was lean and direct, like the simple, unadorned style of Neil Young. Throughout his career, Petty & the Heartbreakers never departed from their signature rootsy sound, but they were able to expand it, bringing in psychedelic Southern rock and new wave influences; they were also one of the few of the traditionalist rock & rollers who embraced music videos, filming some of the most inventive and popular videos in MTV history. His willingness to experiment with the boundaries of classic rock & roll helped Petty sustain his popularity well into the 21st century.