Raiders safety Michael Mitchell, who was drafted with the 47th overall pick in last weekend's NFL Draft, is looking to prove his critics wrong. The stance seems to be a growing theme for Oakland's draftees, as wide receiver Darrius Heyward-Bey is looking to accomplish the same. "I definitely have a lot of motivation," Mitchell said. "Some people basically said I wasn't a good football player from the minute I got drafted." Mitchell, an alum of Ohio University, went from being a potential late-round pick to a second-round selection.