Actually, the ASU player got up as soon as the ref told him to get up, hence, no delay of game penalty.
As for your photo, that would qualify is not having enough evidence...Stave's knee may or may not have been down...either way though, it doesn't matter, he let go of the football and created a potential scrum...how many times per game do defenders jump on a dead ball because it 'might' have been a fumble...dozens. Why does Stave let the ball go and not give it immediately to the referee? He's a derp, that's why, and that's why Wisky lost the game...not the refs, not a phantom delay of game penalty, because it was a bad play call and even worse execution by the QB.