Marcus is a local big man in Denver, having both legitimate businesses and criminal enterprises such as prostitution, drugs, and gun running. He lives in The Castle.
- "a handsome man with dark hair, blue eyes and he was wearing a seriously cool dark suit." - Ashley, Kristen (2011-03-04). Rock Chick (Kindle Locations 8510-8511).
- "He was younger than I expected the king of the castle to be and very good looking. If I saw him on the street, I’d give him a second glance: tall, dark with serious blue eyes that were, somehow, frightening, like he’d seen it all, done it all and wasn’t scared of any of it." - Ashley, Kristen (2011-03-04). Rock Chick Rescue (Kindle Locations 3872-3874).
- Significant Other: Daisy Sloan
- Children: Annamae Shirleen Sloan; Smithson "Stretch" Sloan
- Former business partner: Smithie