PULLMAN — Sports Illustrated once dubbed Washington State “Quarterback U,” a tribute to the steady stream of quality quarterbacks developed in Pullman.WSU still has a knack for developing quarterbacks, but now the Cougars seem to be helping opposing quarterbacks develop as much as their own.For the third week in a row, WSU lost to a team playing its No. 2 quarterback most or all of the game when Matt Scott replaced injured Arizona star Nick Foles early in the second quarter and led the 17th-ranked Wildcats to a 24-7 victory Saturday at Martin Stadium.Scott played quite ably, but the much-maligned WSU defense — ranked last in the nation coming into the weekend — gave up a season-low 352 yards. The 24 points allowed was the least for WSU in a Pac-10 game since a 16-13 triumph against Washington on Nov. 22, 2008.The Cougars racked up season highs of six quarterback sacks and 10 tackles for loss, and Arizona mustered just 10 points and 101 yards in the second half with Foles on the sidelines with a knee sprain. The Wildcats led 21-0 before the Cougars produced their only score, a 23-yard bullet over the middle from Jeff Tuel to Marquess Wilson late in the third quarter. WSU finished with 297 total yards, and Tuel was responsible for 290. He passed for 257 yards and ran for 33 despite being sacked a season-high seven sacks. Only Tuel’s nimble feet, vision and willingness to take a hit when scrambling prevented the Wildcats from reaching double digits in sacks.