Someone please explain this to me?

[Jpoore]

This is not a rhetorical question I generally wanna know the answer to these questions bc I got the life of me can't figure this out. Also this is the last thread I make till after the combine bc I know I have been high on him for a while.
Why Is demarcus Walker so low on mock boards? I know stats don't mean everything but at this point they mean a lot. Why is he not one of the top 2 or 3?
Jonathon Allen
2015: 36 tackles 14.5 tackles for loss 12 sacks 2 forced fumbles.
2016: 69 tackles 16 tackles for loss 10.5 sacks 0 forced fumbles.
Myles Garrett
2015: 59 tackles 19.5 tackles for loss 11.5 sacks 1 int 5 forced fumbles.
2016: 33 tackles 15 tackles for loss 8.5 sacks 2 forced fumbles
Derek barnett
2015: 69 tackles 12.5 tackles for loss 10 sacks 1 forced fumble
2016: 56 tackles 19 tackles for loss 13 sacks 1 int 2 forced fumbles.
Taco charlon
2015: 30 tackles 8.5 tackles for loss 5.5 sacks 1 forced fumble.
2016: 40 tackles 13.5 tackles for loss 10 sacks 0 forced fumbles.
Charles Harris
2015: 56 tackles 18.5 tackles for loss 7 sacks 2 forced fumbles.
2016: 61 tackles 12 tackles for loss 9 sacks 2 forced fumbles.
Takkarist mckinley
2015: 35 tackles 7.5 tackles for loss 3.5 sacks 2 forced fumbles.
2016: 61 tackles 18 tackles for loss 10 sacks 3 forced fumbles
Solomon thomas
2015: 37 tackles 10.5 tackles for loss 3.5 sacks 0 forced fumbles.
2016: 61 tackles 14 tackles for loss 8.5 sacks 1 forced fumble.
Demarcus walker
2015: 56 tackles 14 tackles for loss 9 sacks 1 int 3 forced fumbles.
2016: 67 tackles 19.5 tackles for loss 16 sacks 3 forced fumbles.

Seems to me like his stats measure up better than almost everyone's. So why is he consistently overlooked by everyone? I chose 15 and 16 bc they seem to be most everyones best years. Any answers would be greatly appreciated