Day said it shouldn't come down to one single play but alas it did and the officials blew the call: 

rule for illegal participation 12 player in on the actual play is 15 yards and not 5.

Oregon players knowingly playing in the illegal play coach sent the 12 guy into the secondary to jam up the routes to the flooded side. Check the videos out there this actually happened. This was not a guy running off at the last second this was four rush and 8 in coverage. 
 

It is still a loss, I hope this loss lights a fire under the team this year and will leave no doubt and not leave it up tk bad calls from this point on in the remaining games