The Pac-12’s top 2 teams continued to tighten their grips on the conference title game race, and it appears Washington and Oregon are headed on a collision course with a possible College Football Playoff berth on the line.

But neither of their big wins impressed me as much as what Jedd Fisch is doing in Tucson.

Here’s 1 thing I learned from every Pac-12 team in Week 10 …

Arizona: Wildcats stifle potent UCLA ground game

Of all the positives that befell Tucson on Saturday in a convincing 27-10 win over UCLA, the Wildcats’ defense stuffing the Bruins’ talented backfield was not something I saw coming. Noah Fifita staying hot? Sure. The Cats shutting down UCLA’s pedestrian passing game? Yeah.

But against the league’s 2nd-most potent rushing attack, Arizona was bigger, badder and better. The Bruins, who average better than 204 yards per game — not too far behind league-leading Oregon (208) — had just 114 yards. Backup backup quarterback Collin Schlee, who only entered the game late when Ethan Garbers was injured and Dante Moore ineffective, was the team’s leading rusher with 46 yards. The 3-headed monster of Carson Steele, TJ Harden and Keegan Jones combined for just 88 yards on 19 carriers.

No, Dorian Thompson-Robinson and Zach Charbonnet aren’t there anymore, but that’s still a dangerous running game that Arizona just embarrassed.

Arizona State: Sun Devils swoon after building momentum

Yes, the Utah defense is good. And, yes, they were plenty fired up after suffering a rare home blowout loss to Oregon last week. But Arizona State’s offensive ineptitude against the Utes on Saturday almost redefines futility.

The Sun Devils totaled 83 yards, converted 1-of-15 3rd downs and managed just 6 first downs. ASU had 8 drives go for less than 10 yards and averaged 1.4 yards per play.

After looking mighty competitive the last month, this is who Arizona State really is.

Cal: Bears get little pressure on Bo Nix

A season-long issue reared its ugly head for Cal once more on Saturday in a 49-point thrashing by the Oregon Ducks.

Cal failed to get to Bo Nix even once, as Nix carved up the defense for nearly 400 passing yards and 6 total touchdowns.

The Bears still have just 11 sacks on the year.

Colorado: Buffaloes crumble under the pressure again

By their standards, allowing just 4 sacks counts as a banner day for the collapsing Colorado offensive line. But the Buffaloes found yet another way to be ineffective up front, as they ran for a grand total of negative-7 yards against a very good Oregon State defense.

So much for the switch from Sean Lewis to Pat Shurmur.

Even worse, Deion Sanders faltered under questioning about his decision to switch play-calling duties from Lewis, the former Kent State head coach who bought into Coach Prime’s vision, to Shurmur, an NFL retread.

Oregon: Ducks put up another punishing performance

Bo Nix is on a mission. Already boasting the most career starts in NCAA history, he might have just posted his best game in a 63-19 demolition of Cal.

Nix completed 29-of-38 passes for 386 yards and 4 passing touchdowns with 1 pick while rushing for 2 additional scores as the Oregon offense piled up nearly 600 yards.

More important for the Ducks, they continued to add to their Playoff resume with their 6th win by at least 4 touchdowns.

Oregon State: Andrew Chatfield Jr.’s big day buoys Beavers

Squaring off against an offensive line that has allowed its prolific quarterback to be nothing more than a piñata lately, some blessed Beaver was bound to bludgeon the Buffaloes bigs.

It turned out to be Oregon State linebacker Andrew Chatfield Jr., who had a career day Saturday. The former Florida flameout, who didn’t do much in three seasons in The Swamp, had 3 sacks against the Buffaloes.

He added a pair of pass breakups, for good measure.

That is one heck of a day.

Stanford: Cardinal toughen up in surprise win

The mark of Stanford football for a good decade-plus was a dedication to toughness that erased any kind of nerd-based pejoratives. Yes, the Cardinal had their brains, but man, that was some brawn, too.

In its previous 2 wins this season, Stanford needed big offensive output to down Hawaii (37-24) and Colorado (46-43).

Against Washington State on Saturday, the Cardinal returned to their smashmouth days of yore, limiting the prolific Cougars offense to just 1 score and 245 total yards.

UCLA: Quarterback quandary continues

Just when it appeared Ethan Garbers had turned the corner and UCLA was threatening to turn on the jets down the stretch, the Bruins headed to Tucson and got smacked by Arizona.

It wasn’t just the scoreboard though. Garbers limped off the field and was unable to put pressure on his right foot, and Moore banged his head and was replaced by Schlee.

Suddenly, what seemed like a sure thing in Garbers is now up in the air.

USC: Pass rush has disappeared

Midway through the year, it was clear that the USC defense would not be kissed by fortune like it was last year, when the Trojans consistently dug their way out of trouble with timely takeaways.

But a front seven missing Tuli Tuipulotu was still capable of drumming up some pressure.

Well now the Trojans are officially cooked.

USC managed to get to Michael Penix Jr. just once Saturday, giving the Trojans just 2 sacks in the last month.

Utah: Utes leave no doubt

Well, that’s one way to respond.

If you had any doubts about Utah rebounding from last week’s embarrassing loss to Oregon, those doubts went out the window in about 6 minutes against the Sun Devils.

The Utes had 162 yards before ASU had 15, Bryson Barnes had a career-high 4 scores after last week’s debacle and the Utes ran for 352 yards.

This wasn’t a rebound. This was a put-back dunk.

Washington: Huskies score big win but still have work to do

There’s a reason that Washington is the lowest-ranked undefeated Power 5 team, on the outside of the CFP looking in at this point.

And some of the same worries that have plagued the Huskies during an uninspiring run against feeble Pac-12 opponents.

The USC offensive is far from feeble, but allowing more than 500 yards of total offense and more than 200 rushing yards is not becoming of any Playoff team. And the pass rush is still confounding. Despite a ton of stars in that Washington front 7, the Huskies mustered just 3 sacks against an abundantly sackable Caleb Williams, giving them just 13 for the year, 11th in the conference.

Washington State: Cougars can’t even stop a quarterback at running back

Playing against a suspect offensive line and a rushing attack that is led by a converted quarterback, the once-mighty Wazzu defense faltered once more.

Washington State’s vaunted defensive line had just 2 sacks — including 1.5 by Brennan Jackson — but the Cougars let Stanford pseudo-quarterback Justin Lamson off the hook in a 3rd-quarter touchdown run that tied the game.

Even worse, the Cougars scored exactly zero points in the second half. What has happened to this team?