McCain and Blake are the same guy. Guys that you sign off the scrap heap for next to nothing. Look serviceable to useful in limited exposure. Then when you stick them in the line-up and they get asked to play 75 %+ of the defensive snaps, you can see why they were on the scrap heap to begin with.
That list is full of guys like that. Sure, anyone is better than Blake at this point, but not for big Brandon Browner FA dollars.