Thoughts on the San Francisco 49ers' three-year extension through 2017 of fullback Bruce Miller on Thursday:Smart move: These are the types of signings good teams make. Miller was to be a free agent next year. But as they did with center Daniel Kilgore, the 49ers secured Miler early.Miller is one of the best fullbacks in the NFL. He is very versatile. He is an outstanding blocker and a reason why the 49ers move the ball so well on the ground. He also has a role as a receiver and as a short-yardage back.