Erik McKinney It's down to three Pac-12 programs listed in the newly updated class rankings, as USC fell out due to the decommitment of ESPN 300 DT Tashon Smallwood (Fresno, Calif./Central East), while Arizona (No. 23), Stanford (No. 28) and Arizona State (No. 35) all held steady.Trending up: The Pac-12Momentum is up just about everywhere in the conference, as a number of programs are off to strong starts. Eight teams are undefeated with some big wins (Colorado, Oregon and Washington) sprinkled in. Originally posted by ESPN.com - Pac-12 Blog Click here to view the article.