Kolb has suffered at least two concussions over six NFL seasons. Selected by the Philadelphia Eagles in the second round of the 2007 draft, he lost the starting job to Michael Vick when he was sidelined by a concussion in the season opener in 2010.
Kolb spent the past two seasons in Arizona, where he failed to secure the starting job because of an assortment of injuries, including a concussion in 2011. He switched to a new helmet the following year, one meant to gives addition protection to the back of his head.
Kolb spent the past two seasons in Arizona, where he failed to secure the starting job because of an assortment of injuries, including a concussion in 2011. He switched to a new helmet the following year, one meant to gives addition protection to the back of his head.
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