Sat May 16, 2020 2:43 pm
I would play Diaz full time; don't platoon him with Stefero. (Exception: Against a 7R, 8R, or 9R pitcher.) Also, carrying a third catcher isn't necessary. If you have two catchers and one is injured, the other one can't be injured.
Making changes after the season starts is usually a bad idea (assuming 20% drop penalty). However, tdkearns suggestion isn't awful. Only swap out one of them if you do go that route, and only do it if you get someone you really like.
EDIT: I haven't played in a single-season league for years (I only play mystery leagues now), so I didn't realize the drop penalty is no longer 20 percent at the start of the season for such leagues. So making a necessary change or two is much more likely to make sense.