Jars of Clay is a four-member Christian rock band formed at Greenville College in Greenville, IL. They are often known as the "fab four" of Christian music. Jars of Clay is: Dan Haseltine - vocals, percussion; Charlie Lowell - piano, organ, accordian, keys, background vocals; Stephen Mason - guitar, vocals, lap pedal steel, national, mandolin; Matthew Odmark - acoustic guitar, banjo, background vocals.