Seriously, you're accusing Sam Mustipher of tanking a game? That's very classless of you, and frankly, quite disgusting.
First, and foremost, Sam Mustipher is a competitor, and wants to win. Throughout his entire time at ND, I haven't seen him show anything but a desire to win and do his best.
Second, Mustipher is a true blue ND man, through and through. Even if your wild conspiracy theory had any truth to it, he's not a man who would let something petty get in the way of taking care of the team.
Third, mistakes will happen.