Though Carlos Delgado's first month in MLB ought to be a cautionary tale, here's a comparison of hitting stats for September, for JB and Hernandez (as of 9/26 game):

September  Bautista Hernandez
AB             83      73
R              12      15
H              17      20
TB             28      47
2B              5       6
3B              0       0
HR              2       7
RBI             7      18
BB             10       4
IBB             0       0
SO             24      26
AVG         0.205   0.274
OBP         0.305   0.308
SLG         0.337   0.644
OPS         0.642   0.952

To get Bautista's 7 HR, go back to July 16th, and to match the RBI, to July 28.

With the four hits in his last three games, JB has made September his second best month of the season. Only May's .317 was better. For his $100.8 Million over his BJ career, it's time to go. His 2017 OPS+ of 77 (100 being par for MLB) vs Toronto career OPS+ of 136, and his defensive WAR of -1.5 vs -0.74 per 162 game season.