Matthew Odmark (born Matthew Thomas Odmark on January 25, 1974) is an American musician most known for being a guitarist for Christian alternative folk rock group Jars of Clay.At times, Odmark's first name is noted as "Matthew" instead of "Matt". Curiously, these occurrences all indicate the group's other guitarist Stephen Mason as "Steve Mason", thus expanding Odmark to his full name, while abbreviating Mason's name.