Sanchez
From Memory Alpha, the free Star Trek reference
Doctor Sanchez was a 23rd century Human Starfleet medical examiner who served aboard the USS Enterprise under Captain James T. Kirk during the mid-2260s.
In 2268, Dr. Sanchez conducted an autopsy on Ensign Wyatt after he was killed by Losira. (TOS: "That Which Survives")
Sanchez was only briefly seen behind Dr. M'Benga in an adjacent room conducting the autopsy.
He was played by an unknown actor.
