Panthers All-Pro RB Christian McCaffrey speaks out on mental health of military veterans from Erin Walsh with YardBarker.com/www.yardbarker.com IA recent report from the Costs of War Project at Brown University found that more than 30,000 active military personnel and veterans have died by suicide since Sept. 11, 2001. That’s more than four times as many that have been killed in combat. Carolina Panthers running back Christian McCaffrey learned of that study, and he’s now speaking out about the importance of protecting the mental health of active military members and veterans. “Mental health is an unbelievably important topic, especially today,” McCaffrey…