The Boston Red Sox made a stark improvement to their pitching rotation by acquiring Sonny Gray in a trade with the St. Louis Cardinals. However, the Red Sox's roster is far from being completed.

There is still the free agency of Alex Bregman to worry about . After a year in Boston, the Red Sox must decided if they want to bring him back on a more expensive contract. Even if they opt to, they need at least one more big bat in their lineup.

But even after the Gray trade, Boston shouldn't stop adding to their pitching rotation. Gray is a strong starter, with 160+ innings pitched and 200+ strikeouts in his two seasons wit the Cardinals. Still, the Red Sox should shoot even higher when trying to find their No. 2 starter behind ace Garrett Crochet.

Prior to the trade deadline, Boston s

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