Here's what Bill Belichick said about Isaiah Bolden's medical situation
Bolden injury: Patriots-Packers game suspended – NBC Boston
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Isaiah Bolden injury that suspended preseason game was a concussion (source)
Patriots-Packers preseason game suspended after rookie Isaiah Bolden suffers head injury - The Boston Globe
NFL suspends remainder of Patriots-Packers exhibition after New England's Isaiah Bolden is carted off following frightening collision with teammate
Patriots-Packers preseason game suspended after rookie Isaiah Bolden suffers head injury - The Boston Globe
Isaiah Bolden's injury sobering end to lively week for Packers, Patriots
Frightening scene at NFL preseason game
Patriots' Bill Belichick has positive update on Isaiah Bolden after scary collision in canceled preseason game