Don't know the answer. Wondering if that was a dead giveaway. Horrible call. He is worse than someone who never goes for it. He does the opposite of what right almost every time
McFarlane had a long run on a fake punt previously. Like 60 yards or so (maybe last year?). To your point though, just another tip off to make the fake so obvious.
To actually answer the question I believe he usually is one of the back 3 protectors on punts.
As for the call...wow it was so expected and a terrible call to say the least. My guess is that Shafer has more faith in the punt team getting 4 yards than his offense.