The return of tackle Jake Fisher from injury the week after the Arizona loss marked a turning point. [...] the fifth-ranked Ducks (8-1, 5-1 Pac-12) have allowed four sacks total while winning four straight games — all by at least 12 points. The Ducks head into their game at No. 20 Utah, which leads the nation in sacks, dealing with another offensive line injury, but thinking they are better prepared to deal with it. Offensive line coach Steve Greatwood said he went back to stressing fundamentals and technique with his linemen in practice. The Cardinal were averaging more than three sacks per game coming into Saturday and their aggressive and quick front had given the Ducks all kinds of issues the past two seasons, leading to two straight Stanford wins in the series. The Utes lead the nation in sacks at 4.88 per game, led by wide receiver-turned-speed rusher Nate Orchard (12 sacks) and fellow defensive end Hunter Dimick (nine). Fisher moved over from right tackle to take Johnstone's spot and junior Andre Yruretagoyena took over at right tackle.