During a nearly one-hour news conference, Holmgren explained that McCoy was not checked for a concussion on the sideline after the hit because he wasn't showing symptoms. Also, the team's medical and training staffs were unaware of the impact of Harrison's helmet-to-face mask hit because they were on the sideline working on other injured players.
You'd think out of 70,000 people, somebody would have seen it and brought it to someone's attention.