Matt Waldman shares a sample scouting report on Carolina Panthers running back Christian McCaffrey from the 2017 Rookie Scouting Portfolio.  Christian McCaffrey, Stanford (5-11, 202) Depth of Talent Score: 81.5 = Rotational Starter: Executes at a starter level in a role, playing to his strengths. McCaffrey’s ranking is the result of a Combine-validated process and not…