Travis Shaw was that important last season?
If anyone will go, it might be Chili Davis. Even allowing last season being career years for some, the drop off has been stunning. There's an old stat called runs produced,; it's runs scored + runs driven in - home runs (no double dipping); it's not perfect but in this case it is illustrative:
2016 2017 Difference
Betts 204 165 -39
Bradley Jr. 155 101 -45
Bogaerts 183 132 -51
Pedroia 164 97 -67
Ramirez 162 79 -83
Pedroia has missed a lot of time this year, so that explains some of that large number but I was surprised how few runs Hanley produced last year; this year has been a cliff dive.