After redshirting his first year at Iowa in 2013 , Jewell played in 11 games and made four starts in 2014 . He finished the season with 51 tackles and one sack .  As a sophomore in 2015 , he started all 14 games and led the team with 126 tackles, three sacks and four interceptions .   As a junior in 2016 , Jewell started all 13 games and again led the team with 124 tackles with 1.5 sacks.  He was second-team All-Big Ten for the second straight season, and a finalist for the Butkus Award .  As a senior in 2017 , he won the Jack Lambert Award ,  was a finalist for the Bronko Nagurski Trophy ,  and was named the Big Ten Defensive Player of the Year after leading the Big Ten with 125 tackles.
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