"We struggled last year with [protecting the quarterback and putting playmakers around him]," Rivera said. "The first one being able to protect him. Our left tackle Michael Oher gets hurt and we got to reshuffle our offensive line and move guys around. That wasn't the best thing for us. We went out and made some moves in free agency to help sure-up the offensive line. Then we go out and feel like we have to continue to put playmakers around him. We went out and found a very versatile, explosive running back who had a tremendous college career, and hopefully that translates to the NFL, in Christian McCaffrey. We went out and got Curtis Samuel out of Ohio State, a very explosive vertical attack.