The Boston Red Sox didn't add a first baseman at the trade deadline. They'll stick with the Abraham Toro/Romy Gonzalez platoon that has worked so far, and they'll need to pursue other options for next season.
Boston may already have a potential first baseman in its system. Top prospect outfielder Jhostynxon Garcia has begun preparing to play some first base, according to Katie Morrison-O'Day of MassLive. Garcia has reportedly played at the corner before during spring training, but he hasn't appeared in the infield at all during the minor league season.
Garcia is undeniably a bat-first player, but he's a solid outfielder.