Last season, in 531 PA, Joe Morgan put up a .245 OBP and a .256 SLG to net an OPS+ of 39. The .500 OPS was a full .200 below the seasons immediately preceding and following it (the .762 he had this season was in only 282 PA).
So, if you can have -.200 OPS stinkers like that over 500 PAs, I'm pretty sure you can have -.400 OPS stinkers over 100 PAs.
Edit: also check out this nonsense from Andrelton Simmons!