Glen Mazzara was one of the lead writers and producer of The Shield.
Mazzara has written for other television shows such as Nash Bridges (with head writer Shawn Ryan), Criminal Minds: Suspect Behavior (starring Forest Whitaker and David Marciano) and The Walking Dead (co-starring Laurie Holden and Jose Pablo Cantillo).
- Mazzara provided DVD audio commentary for the following episodes:
- Season 1: "The Spread" (with Shawn Ryan, Clark Johnson and CCH Pounder)
- Season 1: "Cupid & Psycho" (with Michael Chiklis, Walton Goggins, Jay Karnes and CCH Pounder)
- Season 1: "Carnivores" (with Shawn Ryan, James Manos Jr., Scott Rosenbaum and Kurt Sutter)
- Season 3: "Strays" (with Shawn Ryan, Catherine Dent and Jay Karnes)
- Season 4: "The Cure" (with Shawn Ryan, Benito Martinez and CCH Pounder)
- Season 5: "Smoked" (with David Marciano, Cathy Cahlin Ryan and David Rees Snell)
- Season 6: "Haunts" (with Michael Chiklis, Walton Goggins, David Marciano and Michael Jace)
- "Haunts" (co-writer)