Darren McFadden has been injury prone throughout his NFL career, missing at least three games in each of his first three seasons. That makes Michael Bush one of the NFL's most valuable backups at running back. "I have been in this situation for four years now," Bush said. "It's all the same. I just know when it's my turn to play, I need to take care of my opportunities." Bush has learned how to maximize his carries being the Oakland backup. Bush has learned to make the most of his carries. "You get a flow, you get the feel of things and learn how guys are playing certain things," Bush said. "But even if you're not getting a lot of carries and that hole opens up, you need to hit it. But any back, the more carries you get, the better you are." "He has big-game capability," Hue Jackson said. "He knows how to play. You've seen it during his career here, and if he has to play, I feel very comfortable with him playing."