Kuechly was taken ninth overall by the Carolina Panthers. He recorded 165 tackles which is the highest tackle total for a rookie since Patrick Willis in 2007.
David recorded 139 total tackles as well as two sacks and an interception. He has quickly become the leader of the Tampa Bay defense.
As an undrafted free agent, Burfict has made the most of his opportunity in the NFL. Burfict finished with 127 tackles and one sack to finish sixth in the AFC.
The rookie first round pick of the New England Patriots finished the season with six sacks. Jones also contributed 45 tackles and three forced fumbles. He was the main reason why the New England pass rush was much improved in 2012.
Coples made an immediate impact as a defensive end for the Jets. His five sacks and 30 tackles were impressive considering that he was used as a part-time player for a majority of the season.
Many thought that he was a reach when the Seahawks took him in the first round of the draft. However, he proved the doubters wrong by recording eight sacks as well as forcing one fumble.
Gilmore was drafted in the first round by the Buffalo Bills. He quickly became a starter and recorded 52 tackles, forced three fumbles and one interception.
The Dallas rookie had a productive first season in the league. His 55 tackles, one interception and one recovered fumble helped the Cowboys secondary immensely. However, his real impact was as a physical corner who could take an opponent's best receiver away on any given play.
Jenkins may have had the best season of all the rookie defensive backs. He intercepted four passes and scored four touchdowns. Jenkins also recorded 73 tackles while defecting another 14 passes.
There were a lot of rookies who stepped up and helped their team this season. All of these players are going to be vital to the future success of their teams. While all rookies are expected to contribute to their teams, these players have exceeded expectations and should have bright careers in front of them.