Coleman Parker is a political adviser. He was the chief of staff and main adviser to Mayor Clarence Royce during his term.
Parker was responsible for organizing Royce's time and limits access to the mayor. Parker relies on property developer Andy Krawczyk for large donations and assistance in fund raising. He organizes the mayor's re-election campaign including public speaking events with major property developers. He is also responsible for negotiations over debates with the mayor.
In season three, Parker is the first to see that Royce is politically vulnerable because of Baltimore's rising crime rate and urges the mayor to fire acting Police Commissioner Ervin Burrell. Royce resists, because he values loyalty and Burrell has always proved useful to him. When drug tolerant zones set up by police district commander Howard "Bunny" Colvin are exposed in Western Baltimore, Parker advisers that it would be a disaster to support them, despite a fall in the areas' crime rate. Royce entertains the idea of extending the experiment, but Parker eventually convinces him that this would be too difficult to explain to the public. Parker again calls for Burrell to be fired and Royce agrees. However, Burrell convinces Royce that he will deflect responsibility off of Royce, and expects to receive a full term as commissioner as a reward for his loyalty. Parker and Royce privately agree to fire Burrell once they win re-election.
Parker first appears quick to crack down on Burrell and Demper when key political figures are served with subpoenas for their records by the Baltimore police department in season four. He and Royce extracts an assurance from Burrell that there will be no further surprises from the department. In Royce's first debate, opponent Tommy Carcetti scores points against him using knowledge of the recent murder of a state's witness. The Mayor orders Parker to institute a series of measures to strike back against Carcetti, including disrupting Carcetti's campaign and bullying contributors into solely contributing to the Royce war chest, but Carcetti continues to gain on the Mayor in the polls. When Burrell reassigns the lead detective on the witness case this gives Carcetti, Royce's other opponent Anthony Gray uses this against him. Parker urges Royce to fire Burrell and this time he agrees.
Parker is dismayed when Royce alienates State Delegate Watkins, a key supporter with influence among religious leaders, by failing to support Watkins' protegee Marla Daniels. Parker desperately pursues Watkins to urge him to reconsider. This proves to be a turning point in the election race, and Royce is defeated by Carcetti. Royce and Parker later meet with Carcetti and his chief of staff Norman Wilson to amiably discuss the transfer of power. Parker is last seen discussing future prospects with Wilson, planning to either lead another campaign for Royce in a different office or, barring that, a "new buck". 
Behind the scenesEdit
Parker is played by Cleo Reginald Pizana.
|Season 3 appearances|
|"Time after Time"||"All Due Respect"||"Dead Soldiers"||"Amsterdam"||"Straight and True"|
|"Homecoming"||"Back Burners"||"Moral Midgetry"||"Slapstick"||"Reformation"|
|"Middle Ground"||"Mission Accomplished"|
|Season 4 appearances|
|"Boys of Summer"||"Soft Eyes"||"Home Rooms"||"Refugees"||"Alliances"|
|"Margin of Error"||"Unto Others"||"Corner Boys"||"Know Your Place"||"Misgivings"|
|"A New Day"||"That's Got His Own"||"Final Grades"|
|Season 5 appearances|
|"More with Less"||"Unconfirmed Reports"||"Not for Attribution"||"Transitions"||"React Quotes"|
|"The Dickensian Aspect"||"Took"||"Clarifications"||"Late Editions"||"-30-"|