Beanie Wells has surpassed Tim Hightower as the No. 1 running back for the Cardinals. Wells will start for Arizona against Tampa Bay on Sunday. Hightower has lost three important fumbles this season. "I am always taking full responsibility for my actions, and you look at it and think, 'What ifs, what ifs, what ifs,' " Hightower said. "At the end of the day, if you are constantly asking yourself 'What if,' you're probably not in too good of shape."