Pac-12 Heisman Trophy update

Here's a look at what the Pac-12's top Heisman Trophy candidates did over the weekend. Names will be added or subtracted to the list, as warranted.

And if trends continue into next week, we'll add a couple of names and perhaps yank a couple, too.

Andrew Luck, QB, Stanford: Luck was off last weekend. He ranks 11th in the nation in passing efficiency. Trending? Same.

LaMichael James, RB, Oregon: James rushed for a school record 288 yards on 23 carries with two touchdowns in the Ducks' win at Arizona. Trending? Up.

Chris Polk, RB, Washington: Polk had 20 carries for 60 yards with a touchdown against California. He also caught four passes for 85 yards and a TD. He ranks 23rd in the nation with 105.5 yards rushing per game. Trending? Same.

Darron Thomas, QB, Oregon: Thomas completed 11 for 20 passes for 101 yards with two touchdowns and no interceptions against Arizona. He has 12 touchdown passes, just one interception and ranks 19th in the nation in passing efficiency. He also rushed 10 times for 52 yards with two TDs. Trending? Same.

Nick Foles, QB, Arizona: Foles completed 34-of-57 for 398 yards with three touchdowns and no interceptions against Oregon. For the season, he has 10 TDs and no interceptions and ranks fourth in the nation with 361.8 yards passing per game. Problem: His team is 1-3. Trending? Down.

Matt Barkley, QB, USC: He completed 21-of-33 for 227 yards with a TD and two interceptions and a fumble in the loss to Arizona State. Trending? Down.