As is often the case, the University of Washington defensive unit has been ahead of the offense this spring. The offense doesn't have a clearcut No. 1 running back, both Hatchetts are nursing injuries and unavailable across the offensive line, and a host of wide receivers have been sidelined. Yet even if all of those guys were healthy and fully involved, the Husky defense still would be a big problem for them irregardless. The biggest development during a month of practices that conclude with Friday night's Spring Game has been the steady assemblage of a mostly veteran Husky stop unit that stands to be a team calling card this season. One by one, defensive coordinator Ryan Walters has been putting strong pieces in place. "The players continue to get better so it enables him to have a little more flexibility in his scheme," Fsich said of his defensive leader. "He's been able to do more and more things, giving the offense more challenges." Let us count the ways.…