Arizona State became the Pac-12's eighth bowl eligible team, and Washington State didn't put up much resistance.
The Sun Devils rolled to a 46-7 win, with the Cougars avoiding the shutout on their final possession on a 54-yard bomb.
Arizona State outgained Washington State 561 yards to 241. It outrushed the Cougs 260 to one.
Sun Devils quarterback Taylor Kelly was back to his efficient self, completing 20 of 23 passes for 246 yards with four touchdowns and no interceptions.
ASU improves to 6-5 overall and 4-4 in the Pac-12. It visits rival Arizona on Friday in a game that could determine which team gets a better bowl berth.
The Cougars, now a woeful 2-9 and 0-8 in Pac-12 play in coach Mike Leach's lost first season, play host to surging Washington.