TUCSON, Ariz.- It was nearly one year ago that a group of joyous Oregon State football players entered the Valley Football Center media room, playfully slapping coach Gary Andersen across the chest.The Beavers' had just won by 25 points over Arizona in what turned out to be the most thorough victory of the 30-game Andersen era, a moment internally viewed as progression toward the impending completion of a multi-year rebuild.On Saturday night inside the cement bowels of Arizona Stadium, interim coach Cory Hall was in Andersen's place following a 49-28 loss to the Wildcats, who set a single-game school record of 534 rushing yards as the gap between OSU and the rest of the Pac-12 appeared as stark as ever.Calm in tone, Hall repeatedly said that the players "deserve better" and expressed frustration with the defensive coaching staff.Hall never named any assistants, but contrasted his praise for the team's offensive adjustments with the Beavers' continued deficiencies against the run."You saw Arizona run weak side," Hall said."You saw Cal run weak side (last week).So at some point you have to look elsewhere and kind of adjust and put players in a better situation.We have to do better.It has to be top priority. .I'm not unhappy with our players on defense." Asked if he would need to be more hands-on with the defense going forward, the cornerbacks coach said, "Absolutely." The Beavers' eighth consecutive loss dropped them to 1-9 (0-7 Pac-12), two losses away from what would be the second winless slate of conference games in three years.They were 21-point underdogs against a recharged Arizona (7-3, 5-2) team led by sensational sophomore quarterback Khalil Tate, who continued his season of dominance before exiting in the fourth quarter with the game in hand.Tate did to Oregon State what he had done to opposing defenses since taking over the starting job five games into the season.He rushed for 206 yards and two touchdowns on 16 carries, including a 71-yard score with 9:39 remaining in the third quarter to put OSU down 35-7 in front of an announced crowd of 40,984.Two Arizona running backs - JJ Taylor (129 yards on 10 carries) and Nick Wilson (101 yards on 17 carries) - also crossed the 100-yard threshold, one week after California running back Patrick Laird had a career-high 214 rushing yards against the Beavers."At the end of the day, it's on us," said safety Jalen Moore, who finished with a team-high nine tackles."We were making mistakes, technical mistakes; not lining up right.We kind of shot ourselves in the foot." The offensive adjustments OSU made, if nothing else, forced Arizona to keep Tate in the game into the fourth quarter.The Beavers tallied 278 second half yards after mustering only 82 in the first two quarters.They averaged 5.3yards per carry in the final half, as Ryan Nall had 95 yards on 22 carries and Thomas Tyner, who was questionable entering the week, had seven carries for 42 yards.Oregon State only totaled 34 yards on 18 rushes (1.9ya