You can blame it on injuries , and Bregman's was a backbreaker for this lineup, you can say Casas didn't matter because he was not hitting nor fielding well enough, you can say turmoil between Cora/Breslow/Devers put a cloud over the clubhouse ( no proof that any player cares) .
Any of the above do not well explain Bello and Houck's regression, Crawford about to miss 1/2 a season with the same injury as existed last year , The team doesn't hit well to support good pitching by Crochet. Nor explain a BP that is working on overdrive. in April/May.
You are correct FredLynn, it will be a long depressing summer of baseball in Boston.