Kristian Campbell’s Remarkable Transformation in Winter Ball
Kristian Campbell has emerged as a pivotal player for the Boston Red Sox as they look ahead to the 2026 season. Just a year ago, the narrative surrounding him was filled with optimism. Despite a less-than-stellar spring training, he secured the role of opening day second baseman. Fast forward six months, and Campbell found himself navigating the highs and lows of Major League Baseball, earning a Rookie of the Month award, grappling with a significant slump, and ultimately being demoted to Triple-A for the remainder of the season.
The Red Sox’s commitment to Campbell is evident, particularly with the eight-year, $60 million extension he inked in April. To further bolster his development, they decided to send him to play winter ball in Puerto Rico, a strategic move aimed at maximizing their investment in the young talent.
Insights from Campbell’s Winter Ball Experience
As of Tuesday night, Campbell’s journey with the Criollos de Caguas has concluded. Over the course of 14 games, he posted a .245 batting average with a .771 OPS. However, the focus of the Red Sox was never solely on his statistics; rather, they were keenly interested in observing his overall approach at the plate, particularly his ability to handle inside fastballs.
Red Sox hitting coach Pete Fatse, who made the trip to Puerto Rico to assess Campbell’s progress, shared an optimistic evaluation of his performance. “The at-bats looked much better, more than anything else,” Fatse noted. “He just looked quieter in the box.” This observation signifies a positive shift in Campbell’s demeanor at the plate, an essential aspect of his development as a hitter.
A Physical Transformation
One of the most notable changes for Campbell this offseason has been his physicality. After experiencing a loss of muscle mass during the regular season, a significant goal for him was to bulk up. According to Fatse, the transformation was apparent upon his arrival in Puerto Rico. “I noticed it right when I got there,” he remarked, highlighting Campbell’s dedication to his conditioning and strength training.
Red Sox manager Alex Cora echoed this sentiment, noting how much bigger Campbell appeared during his recent visit. Speaking in an interview with Rob Bradford, Cora emphasized the importance of Campbell’s physicality in his development and overall performance. His presence at Campbell’s final game in Puerto Rico underscored the team’s interest in monitoring their promising player closely.
As the Red Sox prepare for the upcoming season, Kristian Campbell’s winter ball experience and transformation could play a crucial role in determining his impact in 2026. With renewed power and a refined approach, he stands as a significant X-factor for the team.

