TUCSON, Ariz. (AP) -- Willie Tuitama threw for five touchdowns and freshman Nicolas Grigsby rushed for 186 yards in his second Arizona start, leading the Wildcats to a 48-20 victory over Washington State on Saturday night.
Grigsby carried 30 times and caught nine passes for 76 yards, including a 22-yarder for a touchdown.
Tuitama, increasingly comfortable in first-year coordinator Sonny Dykes' spread offense, completed 22-of-31 for 346 yards with no interceptions. He also had a one-yard sneak for a score as Arizona (2-3, 1-1 Pac-10) scored 28 straight points after Washington State rallied to tie it at 20 early in the second half.
Another freshman, 6-foot-6, 250-pound tight end Rob Gronkowski, had four receptions for 115 yards, including touchdown plays of 18 and 57 yards.
The wide-open game featured 985 yards of offense, 567 for Arizona.
Down 20-7 with 2:53 left in the first half, the Cougars had 80-yard touchdown drives on their final possession of the second quarter and first possession of the third to tie it at 20. WSU would have had the lead had it not been for the first missed PAT by Romeen Abdullomahammadi in 27 attempts as Washington State's kicker.
Arizona went back on top with two third-quarter touchdowns. Tuitama threw 27 yards to Mike Thomas for one score. His 64-yard pass to Terrell Turner, the Wildcats' longest play from scrimmage this year, set up the quarterback's one-yard sneak that made it 34-20.
Gronkowski's long scoring play came next. Tuitama hit him over the middle, and the big tight end spun away from a would-be tackler, then rambled to the end zone, nearly losing his balance along the way.
The Cougars briefly went ahead 7-3 lead on Brink's 16-yard touchdown pass to Charles Dillon in the first quarter.
The Wildcats took the lead for good on their next possession, Tuitama floating a pass over Grigsby's shoulder on a 22-yard scoring play with 1:37 left in the third.
Arizona padded the lead after Devin Ross intercepted Brink's pass. Grigsby's 18-yard run set up Tuitama's 18-yard scoring pass to Gronkowski, and the Wildcats led 17-7 with 9:47 remaining in the half.
Arizona coach Mike Stoops was on the sidelines after spending several hours in a hospital Friday for treatment of kidney stones.
A UCLA football player was suspended indefinitely Friday after he was arrested on suspicion of rape.
The tougher tests await down the road for No. 3 Baylor Bears, but coach Art Briles has seen enough of his Bears to know this is his best team.
A decision has been made that Randy Edsall will not be the football coach at Maryland next season, and discussions are taking place about how and when to separate, a source said Thursday night.
Appalachian State's board of trustees has approved a five-year contract for third-year football coach Scott Satterfield, who guided the Mountaineers through the transition from FCS to FBS.
Florida State running back Mario Pender has been released from the hospital but could be given a medical redshirt if he cannot return to the field this season.
The University of Wisconsin agreed to a 10-year deal with Under Armour on Friday worth a total of $96 million in cash and the retail value of products received.