Bills running back Marshawn Lynch was back on the practice field Wednesday, more than three weeks after suffering a seriously sprained ankle.  Head Coach Dick Jauron says he’s hopeful Lynch will play Sunday against Miami, although he still wants to see how the ankle holds up during practice with pads today.  If Lynch cannot play, backup Fred Jackson will start again in his place.  Jackson combined for 151 rushing and receiving yards during last Sunday’s win against Washington.