Armstrong played despite a still - injured hamstring that he thought was good to go before the game .
On the flip side , the Hawkeyes ' defense pressured Armstrong , and never allowed the Huskers to find a rhythm running the ball .
Armstrong played despite a still - injured hamstring that Armstrong thought was good to go before the game .
On the flip side , the Hawkeyes ' defense pressured Armstrong , and never allowed the Huskers to find a rhythm running the ball .