Diaz is a 6-foot-2 senior right side hitter from Arbuckle, Calif.
The Argos won their only match of the week, a 3-1 victory over Lewis-Clark State.
Diaz average 3.25 kills per set with an attack percentage of .579.
Also nominated and listed in alphabetical order: Hailey Copinga of Rocky Mountain, Haley Druyvestein of Montana Tech and Rachel Gregg of Lewis-Clark State.