Stoner Zachary, or "Stoney" to his friends, is a minor supporting character in Jason X. He was portrayed by Yani Gellman.
In 2455, Stoney, along with several fellow students and ex-military grunts, goes on a field trip to Earth from Earth II on the spaceship The Grendel. Remaining on The Grendel while Professor Lowe leads a team down to Earth, both Stoney and Kinsa, when Lowe returns to The Grendel with two cryogenically frozen bodies, has his assistant Adrienne Hart find Stoney and Kinsa and have them help her examine one of the bodies (the frozen Jason Voorhees).
Aboard the Grendel, Adrienne went about examining Jason, but Stoney and Kinsa continued kissing and groping each other instead of helping as they should have been. Adrienne banished the two from the lab and they went back to their quarters where they had sex.
Some time later, Jason had thawed and killed Adrienne, then started wandering the ship wielding a surgical tool that suspiciously resembled a machete. He wanders toward Kinsa's quarters just as a security alarm goes off and an announcement goes out summoning all non-military personnel and crew to Lab One. Stoney quickly dresses and heads for the door, but when it opens, Jason is standing in the doorway and impales Stoney with his surgical tool. He then grabs Stoney by the neck and drags him away, leaving Kinsa screaming in terror.