Ex-Pro Bowl CB Sam Shields says concussions left his head 'all mushed up,' regrets NFL career | CBS Sports Headlines Ex-Pro Bowl CB Sam Shields says concussions left his head 'all mushed up,' regrets NFL career Shields suffered at least five documented concussions over his eight-year NFL career with the … Continue reading Ex-Pro Bowl CB Sam Shields says concussions left his head 'all mushed up,' regrets NFL career