PULLMAN - Washington State quarterback Marshall Lobbestael is not ready to get too excited about his team putting up 123 points on its first two opponents.

In beating UNLV 59-7 on Saturday and Idaho State 64-21 a week ago, the Cougars dominated two overmatched opponents.

"The next couple of weeks will pose real tough games for us," said Lobbestael, who threw for career highs of 361 yards and five touchdowns on Saturday.

Washington State (2-0) plays at San Diego State next Saturday, and follows that up with games at Colorado and at UCLA that are likely to provide a better test of whether these Cougars are for real.

But Saturday was also about celebrating the first two-game winning streak in coach Paul Wulff's four years at WSU.

Washington State scored touchdowns on its first five possessions and held a 35-0 lead at halftime to win its first two games of the season for the first time since 2005. The Cougars had 610 total yards of offense, compared to 158 for UNLV (0-2), and a 32-9 advantage in first downs.

"The domination the defensive line displayed today was evident," said linebacker Alex Hoffman-Ellis.

The Rebels' only score was on a 95-yard kickoff return by Tim Cornett late in the fourth quarter.

"They looked like a competitive Pac-12 team and we looked like the team that everybody picked to finish at the bottom of the Mountain West," Montana coach Bobby Hauck said.

Lobbestael, who took over as starter after Jeff Tuel suffered a fractured collarbone last week, completed 24 of 32 passes. The fifth-year senior was not intercepted.

"We tried to pressure them but then they screened the heck out of us," Hauck said.

UNLV quarterback Caleb Herring completed just 11 of 20 passes for 60 yards and the Rebels got just 98 yards on the ground.

Marquess Wilson caught five passes for 102 yards and a touchdown for WSU. Jared Karstetter had six receptions for 66 yards and two touchdowns.

"This football team has answered every challenge that as coaches we put on them," Wulff said. "We know there are more challenges moving forward."

This one was over early, as Rickey Galvin ran 48 yards for a touchdown on WSU's opening drive. Galvin finished with 80 yards on five carries.

On WSU's second possession, Karstetter caught a 5-yard touchdown pass from Lobbestael to cap a 74-yard drive for a 14-0 Cougars' lead.

On WSU's third possession, Lobbestael completed passes of 22 and 37 yards to Wilson, then hit a diving Karstetter for a 19-yard touchdown strike in the end zone. At that point Lobbestael had completed nine of his first 10 passes for 145 yards.

The Rebels, meanwhile, managed only 41 yards in the first quarter and their first three drives ended in punts.

Lobbestael led the Cougars' on an 80-yard drive on their fourth possession, and threaded the ball through a pair of defenders to hit Isiah Barton in the end zone for a 21-yard touchdown pass.

Just over 3 minutes later, Lobbestael hit tight end Andrei Lintz on a 23-yard touchdown pass to close first half scoring.

Lobbestael completed 18 of 21 passes for 274 yards in the first half, and WSU had 372 total yards in the first half while holding UNLV to 95 yards.

In the third quarter, Andrew Furney kicked a 46-yard field goal and Lobbestael threw a 7-yard touchdown pass to Wilson for a 45-0 lead.

Lobbestael threw for only seven touchdowns in his previous three years as a WSU player. He already has seven this season.

"The offensive line was giving me a ton of time," Lobbestael said. "We have a ton of weapons."

Eleven different receivers caught passes, and backup quarterback Connor Halliday threw two more touchdown passes for a total of seven in the game for WSU. The Cougars also managed to rush for 139 yards.