He played college football for the Auburn Tigers, and was selected by the Baltimore Ravens in the first round of the 2007 NFL draft.

He was raised in Eclectic, Alabama and attended Elmore County High School where he was the team's star linebacker.

As a junior, Grubbs managed 110 total tackles, and an interception, also lettering as a four-year starter on the basketball team.

Grubbs moved from defensive tackle to tight end during the 2003 season, playing in a total of nine games, including the last seven.

During spring drills the following year, Grubbs moved from tight end to offensive guard, under the recommendation of his position coach Hugh Nall.

During his Auburn career he blocked for future NFL running backs Cadillac Williams, Ronnie Brown, Kenny Irons, and quarterback Jason Campbell.