Birth Date: August 17, 1982
Birthplace: Dallas, Texas, USA
Death: Mark was found dead from apparent suicide by hanging on January 30, 2018, near his home in the Sunland area of Los Angeles, six hours after he was reported missing.
- General Pictures117 Pictures
- Glee Season 5 (2013)4 Pictures
- Glee, episode: Rumors (2011)1 Pictures
- Glee, episode: Born This Way (2011)1 Pictures
- Glee (2009)40 Pictures