The two began making music with guitarist Steve Mason and eventually formed the band Jars of Clay.

As the EP gained momentum, the group decided to leave college without graduating to pursue their musical career.

Lowell then recruited his friend and McQuaid High School classmate Matt Odmark as the new guitarist.

While different drummers and bassists have rotated in and out, Haseltine, Lowell, Mason, and Odmark have remained the four members of Jars of Clay.

In 2001, Lowell and the rest of Jars of Clay were awarded honorary graduations from Greenville College due to their demonstrated understanding of their craft.