Lucas is 5'10" tall, with dirty blonde hair and blue eyes. He has several scars,
including his right eyebrow (childhood injury), right forearm (from Myamar incident),
left shoulder blade and thigh ( gunshot wounds from ambush in Pakistan). He also has
a couple tattoos, including a steampunk design on his thigh over the gunshot wounds
(can be felt if touched, but hard to see), a Force Recon winged skull on his left shoulder
and a horseshoe that looks implanted into his right shoulder blade around his scars.
Wears glasses when reading.

Formally given a honourable discharge four years ago after events transpiring during a black op (Classified) in Southeast Asia, he was recently re-activated by SGC though he initially did not want to at first. In fact he had been earmarked for the Stargate program much sooner because of that incident.