Guzman and the History Books
El Gran asked a research question, and we shall answer. Thanks to Aaron Haspel's searchable database , we can come up with the list of players who have at least 400 AB in any season and AVG/OBP/SLG all equal to or lower Guzman's current levels (193/233/247):
[insert crickets.wav here]
That's right, if he does not improve, nobody in history has been that bad as a regular.
Here are the modern (post-1920) "records" he is shooting for, for guys with at least 400 AB:
AVG -- Rob Deer, 1991 DET, .179
OBP -- Rob Picciolo, 1977 OAK, .219
SLG -- Ivan DeJesus, 1981 CHC, .233