Matt Waldman shares his 2017 NFL pre-draft scouting report of 49ers’ RB Christian McCaffrey. Christian McCaffrey Ht/Wt: 5-11/202 School: Stanford Ranking: RB2 McCaffrey’s ranking is the result of a Combine-validated process and not a Combine-initiated reaction. Stanford’s offense has always been problematic for evaluating running back play. Although it’s as old-school pro-style as it gets with…