Yankey could have easily justified a jump to the NFL after last season, when he was a consensus All-American and named the Pac-12's most outstanding offensive lineman. Instead, he returned for what most assumed would be one final season on the Farm.
It's a decision the Stanford coaching staff saw coming years in advance. If not for an injury in 2010 -- when he became the first Stanford offensive lineman in 10 years to play as a true freshman -- he'd already be out of eligibility, and it became clear early on in 2011 to offensive line coach Mike Bloomgren that Yankey was destined for the NFL.
There were times that season when Bloomgren, now the offensive coordinator, had trouble finding Yankey on film. It wasn't a bad thing, either. It was because Yankey, in his first year as a starter, played so similarly to junior right guard David DeCastro that it was easy to confuse the two. That's high praise considering DeCastro was a finalist for the Outland Trophy that season and the first offensive guard taken in the 2012 NFL draft (No. 24 overall to Pittsburgh).
How the Cardinal moves on without Yankey appears to be fairly clear cut.
Rising junior Joshua Garnett, who started in place of Yankey at left guard against Washington State and saw regular playing time this season in Stanford's formations that utilized extra linemen, should have an easy transition into the starting lineup. Whether that's at Yankey's left guard spot or at right guard, where Stanford loses Kevin Danser to graduation, remains to be seen.
Johnny Caspers was listed as Danser's primary backup this season and will likely enter spring practice as the favorite to replace him.
The Cardinal will also have to find a new starter at center with Khalil Wilkes out of eligibility and potentially at right tackle as Cam Fleming has yet to announce publicly whether he'll return for his final season of eligibility or enter the NFL draft. The deadline to declare is Wednesday.
Left tackle Andrus Peat, a second-team All-Pac-12 selection this season, is the only starter guaranteed to return from an offensive line that ranked seventh nationally in fewest tackles for loss allowed per game (4.14).