UC Davis enters Sunday's game with a 9-1 record.
WSU improve to 9-2, its best start since 1995-96.
Josh Hawkinson had a double-double with 25 points and 13 rebounds.
WSU faces Loyola Marymount Monday at 2 p.m. in Los Angeles.
WSU played for the 2010 Diamond Head Championship.
Eleven players scored as WSU improved to 8-2.
Four Cougars earned All-Pac-12 honors from Phil Steele Magazine.
Taylor Mims, a 2015 WSU recruit, was named the 2014 Montana Gatorade Player of the Year.
Jordan Branch and Nicole Setterlund receive honors.
Defensive end Jeremiah Mitchell and safety Shalom Luani each signed an NLI.
The WSU track and field teams held an intra-squad meet Dec. 12.
Senior wideout Vince Mayle earned All-America honors from Sports Illustrated.