Olson Switches Centers: Arizona coach Lute Olson will start redshirt freshman forward Mohamed Tangara tonight against Sonoma State instead of junior center Kirk Walters. Walters had been slated to start at center for the Wildcats, but Olson pulled the trigger on the switch to motivate Walters to play harder. With plenty of depth, the Wildcats can afford to punish bad or lazy play. The question is which category did Walters fall into. And who will start when the games actually count toward Arizona’s record? [11/09/05]