Parker is a drug dealer who had been receiving protection by Boyd Crowder. After receiving a tip by Tillman Napier to find a drug dealer, Quarles comes across Longbaugh and Parker who are two drug dealers on Boyd Crowder's payroll.
In "Measures", Quarles shows up posing as an interested buyer. Longbaugh, suspecting the man is a police officer, subtly holds a katana up to his neck in order to scare him. Parker, cocking his handgun, warns Quarles not to touch anything. Longbaugh tells him that the cops come in to search, and no matter where they put drugs, they will find them. Quarles says that where he is from, dealers rip each other off all the time. Parker says that nobody ever steals from them, and Longbaugh quickly becomes annoyed with Quarles's questions and tells him that it's time to do his business and leave. Quarles distracts Longbaugh by asking him how to get the rust stain off his katana, and shoots Parker in the head.
- Boyd Crowder: Business associate
- Longbaugh: Fellow drug dealer
- Robert Quarles: Murderer, deceased
- Greta: Neighbor
- "You just be real careful how you move around here Pop. Don't touch shit till you pay." - Parker to Quarles in "Measures".
- Parker and his associate, Longbaugh, are a reference to the film The Way of the Gun, which stars Ryan Phillippe and Benicio Del Toro as the film's protagonists, Parker and Longbaugh.
|Season three appearances|
|The Gunfighter||Cut Ties||Harlan Roulette||The Devil You Know||Thick as Mud|
|When the Guns Come Out||The Man Behind The Curtain||Watching the Detectives||Loose Ends||Guy Walks Into a Bar|