|First Appearance||"Knots Untie"|
|Series lifespan||"Knots Untie" to Present|
- "Gregory, just get in there."
- —Marco to Gregory[src]
Nothing is known about Marco's life prior to or as the outbreak began.
Marco first appears returning to the Hilltop with Ethan, Andy and Crystal. He is apart of the fight that follows. Lucas pins him down and punches him several times, knocking him unconscious.
Marco first appears threatening Lucas after he shows up at the Hilltop. He eventually lets him through to Maggie and Sasha. Later, he runs to help defend the Hilltop when the walkers enter. And he is finally seen at the end, opening the gates of the Hilltop to let Lucas out.
Marco first appears outside of the Hilltop, voicing his opinion on fighting the Saviors. He agrees that they must be stopped and volunteers to fight.
Marco appears training with the other members of the Hilltop.
Marco appears firing at Saviors with Maggie, Jesus and the other members of the Hilltop.
Marco appears preparing for the assault on the Sanctuary base, he is seen talking to Alvaro. He later participates in the assault on the Sanctuary and leaves with the other Hilltop members.
Marco appears guarding the Saviors prisoners and later help put Gregory into the gallows along with the Saviors.
Marco appears in a car with Neil, Dianne, Maggie and Jesus. He witnesses Neil getting killed right next to him. Later, he appears at the Hilltop and witnesses Maggie killing Dean.
This list shows the victims Marco has killed:
- Possibly numerous counts of zombies.
- Three Saviors
- "Knots Untie" (No Lines)
- "Go Getters"
- "Rock in the Road"
- "The Other Side" (No Lines)
- "The First Day of the Rest of Your Life"