Fields struggled Monday in just his second relief appearance of the season, allowing a run on three hits over a third of an inning against San Diego. Fields, who was activated from the DL less than a week ago after dealing with a groin injury, tossed 19 pitches (14 for strikes) to record his lone out of the game. With Tony Sipp, Pat Neshek, Chad Qualls and Luke Gregerson all pitching well in the late innings for Houston, there's a good chance Fields won't pitch in too many high-leverage situations until he shakes the rust off.