Just two years ago, Boston Red Sox fans dreamed of a future centered on the "Big Three:" Roman Anthony, Marcelo Mayer, and Kristian Campbell were all ranked among the top 15 prospects in baseball. 

Fast forward to today, and Anthony has struggled to stay on the field and meet the superstar expectations placed on him. After struggling to stay healthy and perform, Mayer was dealt to the San Francisco Giants at the trade deadline for reliever Erik Miller. Campbell spent the entire 2026 season in Triple-A Worcester, where he transitioned to a full-time outfielder while reworking his swing.

The 24-year-old Campbell performed well in Worcester, hitting .256/.383/.380/.763 with eight home runs, 22 doubles, and 51 runs driven in 109 games. Campbell had a particularly strong second half, hitting .320/.440/.524/.963 in his final 45 games of the season. 

Despite his strong performance, Campbell was never really in contention to return to the major league roster in 2026 because of an already crowded outfield. Even if Red Sox president of baseball operations Craig Breslow trades an outfielder and clears the logjam, promoting Campbell would only recreate that problem. 

Thanks to his eight-year, $60-million extension, Campbell is likely untradeable with such limited major league success. From the Red Sox point of view, Campbell is only two years away from being one of the 10 best prospects in the sport and is coming off a solid showing in what was his second full season in the minor leagues. 

Breslow discussed Campbell's future with the team with Mac Cerullo of the Boston Herald, saying, “Still feel like he’s got a world of potential. We saw it in the minor leagues when he was coming up, we saw it in the first month of the season when he was up with us, and I think we started to see it in the second half last year, too."

"We still feel like he has a really bright major league career ahead of him and excited to get to spring training and see that manifest itself on the field,” he continued. 

Defensively, Campbell was earmarked as the second baseman of the future in Boston; however, he was among the worst defenders at the position in 2025, posting a -16 defensive runs saved, -8 outs above average, and -10 fielding run value in 471 innings at the position. Those struggles led the team to shift him to a full-time outfielder in 2026, where he spent all of his time in Triple-A. Breslow said the team wanted him to focus on just one position defensively as he reworked his swing. As for him returning to the infield dirt? Breslow didn't close the door on that, saying, "I think over the long run it’s something that we may revisit."

Regardless of what the roster looks like heading into spring training, it will be a massive opportunity for Campbell to show he belongs in the big leagues.