They had a good thing going with Pelf when the decision was made. It didn't really add up, but he was overperforming. Based on the fit he threw when starting the season in the pen, they clearly figured May, being more confident, less fragile mentally, would be better equipped to take on a new role. It didn't work on the field, but it was probably a thoughtful managerial decision. May will be back in there real soon, and maybe Pelf will feel at this point as though he'd been given that fair shot after all.