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Bello is re-introducing a curveball to his arsenal this spring, Jen McCaffrey of The Athletic reports.

With assistance from new teammate Ranger Suarez, Bello is expanding a repertoire that already includes a four-seamer, sinker, cutter, sweeper/slider and changeup. Bello, who came to the majors as a 23-year-old in 2022, threw a curve earlier in his career but couldn't find the right shape or proper arm slot for it. Red Sox pitching coach Andrew Bailey believes that Bello, through his experience at the MLB level, has developed to a point where he understands the benefits of horizontal and vertical breaks against hitters from either side of the plate. Adding back the curveball gives him another weapon to serve that goal. Bello is projected to slot fourth in Boston's rotation.

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