A springboard for change: new players, new systems, new superstars ... 'tis the season for testing the theories that will play out on the field in the fall.(COLLEGE FOOTBALL)

BUILDING BLOCKS

Three rising stars teams will build their offenses around:

* QB Willie Tuitama, Arizona, The staff thought about adding some zone-read principles to the offense, but Tuitama is too good throwing the ball to let him take a lot of hits as a runner--losing him would leave the Wildcats without a proven passer. Arizona will, however, take advantage of Tuitama's accuracy when throwing on the run with sprintouts and rolling pockets. The Wildcats will use him in the same way Arizona coordinator Mike Canales used Philip Rivers at N.C. State.

* RB Darren McFadden, Arkansas. Ladies and gentlemen, we give you the next Reggie Bush. You can thank us for the tip after the quick and powerful McFadden runs for 150-plus yards and returns a kick for a touchdown in the season opener against Southern California. McFadden touched the ball 204 times last year (18.5 per game), and the staff wants him to get 25 to 30 touches per game. The goal this spring is to get him more involved in the passing game and match him up in space against linebackers and safeties.

* QB Rhett Bomar, Oklahoma. OU wants to add more run options to its spread offense, but Bomar's accuracy decreased significantly last season when he was outside the pocket. OU hired offensive line coach James Patton from Northwestern because no one runs the spread better than the Wildcats. Changes to the team's blocking schemes are intended to make Bomar more confident when throwing from a moving pocket.

FILLING BIG SHOES

The three biggest replacements--not at USC or Texas--and what they'll mean for next season: