Matthew Jerome Barr is an American actor, best-known as Danny McNamara in the CBS/Paramount+ action–adventure television series Blood & Treasureand as Johnson "Johnse" Hatfield in Hatfields & McCoys. Barr also played Mike Fleming in Commander in Chief, Ian Banks in One Tree Hill, Christopher Sullivan in the mystery-horror limited series Harper's Island, and Dan Patch in The CW series Hellcats.