Robertson started seven out of 17 games played in 2008, with 548 yards and six touchdowns rushing, 258 yards and one touchdown receiving, and 333 yards on kickoff returns. In 2009, Robertson played in 18 games where he rushed for 1,031 yards and nine touchdowns, received for 482 yards and 37 yards, and had 191 kickoff return yards.
In 2008, Robertson played in seven out of seventeen games, accumulating 548 yards rushing, six touchdowns, 258 yards receiving, and 333 yards on kickoff returns. In 2009, he appeared in eighteen games, gaining 1,031 yards rushing, nine touchdowns, 482 yards receiving, and 37 yards on receptions, along with 191 yards on kickoff returns.