Running back Maurice Jones-Drew never had to search for motivation. It came in daily doses from people questioning him because of his stature.

Time and again, the 5-foot-7 Jones-Drew silenced doubters with his play, be it at De La Salle High, UCLA or the Jacksonville Jaguars. Now that he's with the Raiders, he has found a new source of motivation from those who wonder if he has anything left.

"There's nothing you can do to please everyone," Jones-Drew said Thursday after another practice in which he earned praise from teammates and coaches. "People will be humbled sooner or later. If it's not by me, it will be by somebody else."

Jones-Drew, 29, led the league in rushing in 2011, and he was atop the chart again in 2012 when he suffered a broken left foot.

The injury limited him to six games and required surgery. Jones-Drew had two screws inserted into his foot, which forced him to relearn how to walk, let alone run.

So, perhaps it's no surprise that last season Jones-Drew rushed for only 803 yards and 3.4 yards per carry, or almost 1 yard less than his previous career-low.

With that came doubts about whether Jones-Drew still has what it takes to be an every-down back. He calls such talk "hilarious."

"I know what I have left," Jones-Drew said. "I know the work I put in this offseason to get to where I need to get to be able to play at a high level. I stopped worrying about what people were saying."

There are few things Jones-Drew loves more than a challenge. Tell him he can't do something, he'll find a way.

He had plenty of people telling him last season that his best days were behind him. As a result, Jones-Drew embarked upon a workout routine this offseason that confirmed he still has the desire to be the best back.