Phelps was a S.H.I.E.L.D. agent at the time of Alphonso Mackenzie's directorship. He was enlisted in a mission on the Zephyr One when S.H.I.E.L.D. decided to track down Sarge and find out where he was headed. Before the Zephyr One took off, Phelps brought Pax into the plane and chained him up, ordering him to remain seated. He was then assigned to guard both Pax and Jaco.
However, during the flight, as Pax grew more and more agitated at the idea that they were going where the Shrike Tower was being built and pretended to turn on Jaco, Phelps failed to see that Pax had managed to get close enough to attack him. As a result, Phelps was strangled to death by the chains restraining Pax, who then used the key carried by Phelps to break free of his chains.
- Handgun: Phelps used a handgun as a sidearm and notably threatened Pax with it since Pax tried to break free of his chains and menacingly moved towards Phelps.