Who were the best picks and biggest mistakes in the Ravens‘ 20 years of drafts? Columnist Mike Preston will break it down by position over the next two weeks. Today he tackles running backs…

Best pick: Despite Jamal Lewis having suffered a major knee injury and plagued by minor legal issues in college, the Ravens took him No. 5 overall out of Tennessee in 2000. He went on to help the Ravens win the Super Bowl that season and he was a major force in the team’s continued dominant running game, which complemented a top-ranked defense. Lewis spent seven seasons in Baltimore, missing one with a knee injury. In five of those six seasons on the field, he gained more than 1,000 rushing yards; in 2003, he led the league with 2,066. Once he got to the line of scrimmage and squared his shoulders, Lewis was tough to bring down. The Ravens got another strong running back in 2008 when they selected Ray Rice out of Rutgers in the second round.

Biggest mistake: In 1997, the Ravens selected Jay Graham out of Tennessee in the third round. At 5-foot-11 and 215 pounds, Graham seemed to have it all but he never stayed healthy during his three seasons with the Ravens. He had size and speed, but never lived up to his potential as the team’s future star running back. In five seasons in the league, Graham had a total of 454 yards rushing and two touchdowns. Another mistake for the Ravens was not getting more out of Texas running back Priest Holmes, whom they signed as an undrafted free agent in 1997. Former Ravens coach Brian Billick questioned Holmes’ passion for the game, and Holmes went on to become one of the league’s top rushers with the Kansas City Chiefs.