Yes. But the ones that are struggling the most are not rookies. They are vets. They should be able to adjust without someone telling them to.It is on the offense, but part of that is on the manager.
Cora literally announced to the rest of the baseball world that he told his guys to be aggressive and to jump on first pitches. It took the league a while to catch on, but they figured it out around the break -- the Red Sox will chase A LOT of bad pitches as part of Cora's aggressive approach. The Red Sox never adjusted. They've chased way too much crap and made for a ton of easy outs, either by striking out on pitches not even close to the zone -- like the three in a row vs. Holmes -- or making first pitch outs on pitches they should take for ball 1.
Some of that is on the hitters, but some of it is on Cora. He needed to get it through to them. Teams also figured out the Red Sox bullpen is made up of a bunch of nibblers trying to make the perfect pitch (except for Whitlock). Opposing hitters stopped chasing against the Sox relievers.
We saw the results this weekend.
If the meat of our lineup (Xander, Devers/JDM etc) has a series like this in the playoffs, not much any manager could do.