Education
Detroit Country Day reached the 2007 Michigan High School Athletic Association Division 4 State Championship game at Ford Field. Demens recorded 11 tackles in the game. Demens was regarded as the 23rd, 23rd and 35th best high school football linebacker in the country as a senior by Scout.com, Rivals.com and Entertainment and Sports Programming Network.com, respectively.
Rivals also ranked him as the eighth best high school football player in the state of Michigan.
Demens saw action as a true freshman in three games under first-year head coach Rich Rodriguez for the 2008 Wolverines.
Demens became a starter in the October 16 game against Iowa, and by the end of the season he recorded 10 tackles or more four times.
He posted 12 tackles (5 solo and 7 assists) against Penn State on October 30, 10 tackles (5 solo and 5 assists) against Illinois on November 6, a career-high 13 (5 solo and 8 assists) against Wisconsin on November 20, and a career-high-tying 13 tackles (9 solo and 4 assists) against Mississippi State in the January 1, 2011 Gator Bowl.
Under new first-year head coach Brady Hoke, Demens led the 2011 Wolverines in tackles and recorded his first three (2 solo and 2 assists) quarterback sacks. His solo sacks came against Northwestern on October 8 and Illinois on November 12.
He recorded ten or more tackles three times. He posted 12 tackles (8 solo and 4 assists) in the rivalry game against Notre Dame on September 10 in the first night game played at Michigan Stadium, 10 tackles (5 solo and 5 assists) against Northwestern on October 8, and 11 tackles (3 solo and 8 assists) against Iowa on November 5.
He was an honorable mention 2011 All-Big Ten Conference selection by both the coaches and the media for the 2011 team
Demens led the team and finished among the conference leaders in tackles/game (72, t-13th).