Sean Michael O'Bryan (born September 10, 1963 Louisville, Kentucky, USA) is an American film and television actor from Louisville, Kentucky. He attended and graduated from St. Xavier High School.
Early television work includes guest roles on such television series as Married... with Children, MacGyver, Northern Exposure, Cold Case, Quantum Leap, Murder, She Wrote, Chicago Hope, Roswell (season 3 episode 9), Roseanne (season 8 episode 19), Six Feet Under, Criminal Minds, The King of Queens and Dexter. More recent television credits include CSI, Bones, Melissa & Joey, Hot In Cleveland, The Mentalist, Leverage. He appears in the recurring role of Ron Donahue on The Middle.