Maurice Jones-Drew has a message for all the skeptics who doubt that he and Darren McFadden can erase two seasons of injury and ineffectiveness.

"Everybody can say what they want," Jones-Drew said Tuesday as the Raiders began a three-day mandatory minicamp. "Just don't be the same guy in a couple of months saying, 'Oh, we knew they could do it.' Hold yourself accountable like everyone holds us (accountable)."

As recently as 2011, McFadden and Jones-Drew were considered among the top running backs in the NFL. McFadden was averaging 5.4 yards per carry when he went down with a Lisfranc injury to his foot. Jones-Drew had a career-high 1,606 yards rushing.

In 2012, Jones-Drew had a Lisfranc of his own and played in just six games, gaining 414 yards while McFadden was averaging 3.3 yards per carry as the Raiders switched to a zone blocking scheme.

Last season was even worse. Jones-Drew averaged 3.4 yards per carry in 15 games, needing 234 carries to gain 803 yards. McFadden, even with a return to the power blocking scheme, again averaged 3.3 yards per carry in 10 games, again battling injuries.

Jacksonville made no effort to re-sign Jones-Drew, who led the franchise in rushing with 8,071 yards and touchdowns with 81. The Raiders brought McFadden back in part because they could get him at fraction of what he made in his first five seasons.