Stanford Cardinal football is known for its
3–4 defense schemes, more typically seen in the NFL. Gardner was a three-year starter at
defensive end in the Stanford 3–4 system, which was ranked among the nation's top defensive units. Gardner did not see field action in his first year (2009). As a sophomore or "redshirt freshman" in 2010, Gardner saw action in 11 games on special teams and as a second-string defensive end. He logged three tackles, including two tackles for loss and one sack. In 2011, he started 12 of 13 games, including the
Fiesta Bowl vs. 13th nationally ranked Oklahoma state. Gardner recorded 35 tackles, 10 tackles for loss and 4.5 sacks. He was named to the
All-Pac-12 Conference 2nd Team, and received Stanford's Deswarte-Eller Award honoring the most outstanding (redshirt) sophomore. Gardner ranked 13th in the Pac-12 in tackles for loss per game, and 16th in sacks per game. Playing at #7-ranked
Notre Dame, Gardner made two solo tackles, one fumble recovery, and one sack which caused a fumble that was recovered for a Stanford touchdown. Gardner's season also included 49 tackles, 5 passes broken up, and 2 quarterback hurries. He chose to return to Stanford for a fifth year in 2013, rather than enter the
NFL draft, but it ended early because of a torn pectoral muscle he suffered against
Oregon State University. ==Professional career==