When your game uses a DH, the pitchers are not listed in the WIS boxscores. Therefore, your pitchers' fielding stats are not included.
I noticed this some time ago when the number of total putouts did not equal the number of outs for some games. I couldn't understand what was wrong, because there must be a putout for every out recorded in a baseball game. (Even for outs like interference calls, someone must be credited with a putout.) I finally figured out that the missing putouts were made by pitchers who were not in the boxscores because of the DH.
Also, in the game play-by-play, that little red - sign for a poor play is hard to see against the dark gray background.