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McCaffrey, the Panthers’ top pick, was kept away from the facility because of an NFL rule<p>Because of an NFL rule that prevents underclassmen from joining their NFL teams for practice until their school year is complete, Panthers running back Christian McCaffrey had to stay away from the facility for …

Read more at CBS Sports: http://www.cbssports.com/nfl/news/look-schools-out-so-christian-mccaffrey-has-finally-joined-the-panthers/