That’s what we learn from a site apparently called “I Know”:

What team have the best defense in college football this comming up season?
Please describe and break down to why they’re the best. Don’t just tell me the school only.

Best Answer
LSU of couse their d linemen r huge did u see the game against notre dame the d linemen were like twice notre dames o line’s size they r the best rush d in the country their linebackers r pretty good too and their secondry is amazing they have great corners and their safteys aren’t bad either

So there you have it: the best case for LSU’s defense.