I've Googled and cant really find any hits
but I remember some years ago that The FO had to make a number of in-season moves with injuries
(Maybe it was Willie Anderson coming in, I don't remember)
All I can remember is that cap space got unbelievably tight and someone from the FO said something to the effect that we may not be able to have all practice squad slots filled.
Something to the effect that when money runs out, it runs out, nothing you can do about it, but I can't find anything on the net documenting it.