Top 15 college quarterbacks with the most to prove in 2015

Dec 27, 2014; Bronx, NY, USA; Penn State Nittany Lions quarterback Christian Hackenberg (14) drops back to pass against the Boston College Eagles during the second quarter in the 2014 Pinstripe Bowl at Yankee Stadium. Penn State defeated Boston College 31-30 in overtime. Mandatory Credit: Rich Barnes-USA TODAY Sports

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