I have the same fear. Hi is my favourite pitcher on the team by far, but his long term projection scares me since he has so little room for regression in his velocity. With that said, I absolutely see the need to lock him up for awhile. Lester and Hamels are both toward the end and Quintana and Darvish are both question marks, so this helps stabilize a portion of the rotation for the foreseeable future. Even if Hendricks regresses somewhat, the numbers in this deal don't look bad for a middle of the rotation starter. I'm just glad the Cubs finally did "something."