He is, but team success often puts guys on the radar. Knott will have his day in the sunshine this year.
BTW, how many tackles, TFL's, and Int's did Nielsen have last year?
And how many of Knott's INTs were a result of him taking very good pass drops and then reacting well to tip-drill balls? It's not like all of Knott's picks were the result of him taking great breaks on the ball as he's running with TEs/RBs/WRs. I watched enough ISU games to know that that simply was not the case.
Also, it's simply foolish to compare Knott's tackle production to Nielsen's. Nielsen played a role position for Iowa ... a spot that, on average doesn't equate to impressive production. However, all the same, Nielsen's production actually was surprisingly good for an Iowa LEO LB ... particularly given that he played in only 8 games ... and a few of those he was really dinged up.
Here's a little bit of reference for ya:
'03 Iowa LEO LB: Grant Steen (set the pre-Edds gold standard at the LEO spot)
In 12 games: 58 tackles, 2.5 TFLs, 1 INT, 4 pass break-ups
'04 Iowa LEO LB: George Lewis (more of an ILB, but played on a great '04 Iowa D)
In 12 games: 43 tackles, 3 TFLs, 1 INT
'05 Iowa LEO LB: Edmund Miles (more of an ILB, blitzed a good bit due to young DL)
In 12 games: 68 tackles, 9 TFLS, 1 sack, 1 INT
'06 Iowa LEO LB: Mike Humpal (more of an ILB, very good in coverage, but injured in '06)
In 12 games: 49 tackles, 4.5 TFLs, 3 INTs, 3 pass break-ups
'07 Iowa LEO LB: AJ Edds (THE GOLD STANDARD)
In 12 games: 80 tackles, 3.5 TFLs, 1 INT, 4 pass break-ups
'08 Iowa LEO LB: AJ Edds (THE GOLD STANDARD)
In 13 games: 59 tackles, 4.5 TFLs, 2 sacks, 1 INT, 4 pass break-ups
'09 Iowa LEO LB: AJ Edds (THE GOLD STANDARD)
In 13 games: 78 tackles, 4.5 TFLs, 0.5 sacks, 5 INTs, 4 pass break-ups
'10 Iowa LEO LB: Tyler Nielsen
In 8 games: 42 tackles, 4.5 TFLs, 1 INT, 4 pass break-ups
If Nielsen were able to remain healthy and maintain that level of production through Iowa's 13 games in 2010, Iowa would not only have won more games, but his hypothetical production would have looked like:
68 tackles, 7 TFLs, 1 or 2 INTs, 7 pass break-ups
Needless to say, such production would have been comparable to that put up by the very best LEO LBs to have played at Iowa.