I'll post this again and I can tell you this, Mathieu isn't even close.
Berry's 2008 (Sophomore stats)
Prior to the season, despite being a sophomore, Berry was named a team captain.
[10]
 For the year, Berry tied for the national lead in interceptions with 7  and returned them for 265 yards and 2 touchdowns, breaking the record  he set the year earlier. Combined with the yards he accumulated as a  Freshman, Berry set the all-time career SEC record for interception  return yards with 487 yards, only 14 yards shy of the NCAA record for  interception return yards, set by 
Terrell Buckley during his time at 
Florida State. He also finished the regular season with 72 tackles, 6 pass break-ups and 3 sacks.
 Berry also took snaps on offense at quarterback and 
wide receiver, gaining 44 rushing yards on 7 carries. In addition, he gained 32 yards on 2 kick-off returns.
 His early success had some journalists speculating that he could end up being the best defensive player in Tennessee history.
[11] He was nominated as a finalist for the 
Jim Thorpe Award, the 
Lott Trophy, and the 
Chuck Bednarik Award.
 Berry was named the 
SEC Defensive Player of the year and was a unanimous First-Team All-SEC pick. He was also a unanimous First-team 
All American. The 
Touchdown Club of Columbus also named him their winner of the 2008 Jack Tatum Award as well.
Mathieu 2011 before Ark:
http://espn.go.com/college-football/player/_/id/504168/tyrann-mathieu