Yellowcard (1997–2005)
Harper Founded Yellowcard in 1997 with Longineu W. Parsons III, Ben Dobson, Todd Clary, Warren Cooke, and Sean Mackin after meeting at Douglas Anderson School of the Arts. The band released its first album, Midget Tossing, recorded in Jacksonville Beach in 1997. Its second album, Where We Stand, was released in 1999. After Dobson left the band, Harper asked friend Ryan Key to be the band's new lead singer. The band then released the Still Standing EP in early 2000. Shortly after the release of their EP, Todd Clary left the band, Key then filled in as the rhythm guitarist. The members moved to Camarillo, CA, after being signed to Lobster Records. They then begin working on their next album.
The group released their third album, One for the Kids in 2001 and followed up with The Underdog EP[1] in 2002. After the release of The Underdog EP, Warren Cooke left the band due to personal reasons. The band later asked close friend Peter Mosely from Inspection 12, to become the band's new bass guitarist. After Yellowcard released The Underdog EP the band signed with Capitol Records, who were looking to sign pop punk bands at the time. Yellowcard then began the recording of their major-label debut album Ocean Avenue in late 2002.
Mosely left during recording of the album due to personal problems. The band then asked Alex Lewis to join as the bass guitarist. Yellowcard released their album Ocean Avenue on July 22, 2003 reached No. 23 on U.S. Billboard 200, the album was a commercial success in the United States with the hit singles Way Away, Ocean Avenue, and Only One.
In early 2004, Lewis left the band after Mosely rejoined as the band's bassist. In 2005, Harper went with the other band members to Los Angeles while Key and Mosely moved to New York City to create new material for their next album. During the following months, tensions arose between the band members. In an interview with MTV News, he said that he was finished with writing the guitar tracks for the album and that he was leaving the band. He was replaced by Ryan Mendez from the band Staring Back.