PULLMAN, WASH. - Shaquille Richardson had the best - and worst - night ever.

The Arizona Wildcats' freshman cornerback made his first career start in Saturday's 24-7 win over Washington State, registered his first career interception - he finished the night with two - and got burned for his first big play.

Following the game, Richardson received his first career game-ball - and his first butt-chewing from coach Mike Stoops.

"At the same time," he said with a smile.

All things considered, not a bad night. Richardson, who learned just before kickoff that Trevin Wade (thigh bruise) wasn't going to play, turned the momentum in Arizona's favor in the first quarter.

Washington State recovered an onside kick on the opening kickoff, then converted on fourth-and-one from the Wildcats' 49.

Two plays later, Richardson intercepted WSU quarterback Jeff Tuel as he attempted to throw a crossing route at the UA's 29. The Wildcats took over, disaster averted.

"To get the momentum going back in our favor, that was huge," co-defensive coordinator Greg Brown said.

Richardson experienced both highs and lows during a fourth-quarter drive. He was beaten by receiver Marquess Wilson for an 83-yard gain that certainly would have gone for a touchdown had Richardson not ankle-tackled him at the Wildcats' 12.

Richardson redeemed himself two plays later, intercepting Tuel in the end zone.

Stoops said he was happy with the way Richardson bounced back.

"He made some great plays," Stoops said, "and learned some valuable lessons."

Injuries mounting

Nick Foles wasn't the only Wildcat to get hurt Saturday.

Defensive tackle Justin Washington (knee sprain) didn't finish the game, and wide receiver David Douglas (thigh bruise) was limited. Wade and wide receiver Bug Wright (sprained shoulder) traveled to Pullman but did not play, and guard Vaughn Dotsy (back) stayed in Tucson.

Everybody except for Foles and Washington should be back for this week's homecoming game against Washington.

Grigsby moves up

Nicolas Grigsby's third-quarter rushing touchdown moved him into third place in program history. Grigsby's 26 career scores trail only Art Luppino (44, 1953-56) and Ronald Veal (27, 1987-90). Grigsby entered Saturday's game tied with Trung Canidate for third place.

Grigsby finished Saturday's game with 66 yards on 14 carries. His 4.7 yards-per-carry average was tops on the team.

Extra points

• Sophomore Khyri Knowles made his first big play as a Wildcat, recovering punter Reid Forrest's mishandled snap on WSU's first possession of the second half. The 5-foot-11-inch, 175-pound Knowles joined the UA as a walk-on following a career at powerhouse De La Salle High School in Concord, Calif.

• Looking for a bit of good news from Saturday's game? Meet Tito Foster.

The Wildcats' special-teams expert made his season debut in the UA's 24-7 win over Washington State. Foster, a senior, missed most of last season after undergoing reconstructive right knee surgery. He returned for spring drills, only to reinjure it intercepting a pass in a practice.

He was inactive for the Wildcats' first five games.