The Boston Red Sox are gearing up for an exciting spring, and one question looms larger than the rest: Who will step up to solidify their infield by Opening Day? With Willson Contreras locked in at first base and Trevor Story manning shortstop, the spotlight falls on the remaining positions—and the non-roster invitees (NRIs) who could fill them. But here’s where it gets intriguing: while this year’s NRIs might not boast Top 100 prospects like the 2025 group, they’re far from ordinary. Let’s dive into four players who could make a splash this spring—and spark some heated debates along the way.
In 2025, the Red Sox struck gold with their NRIs, uncovering 10 future Major League contributors, including the highly touted ‘Big Three’: Roman Anthony (No. 2), Kristian Campbell (No. 7), and Marcelo Mayer (No. 12). These prospects not only debuted last season but are poised for expanded roles in 2026. Utilityman Nate Eaton and lefty reliever Jovani Morán, also 2025 NRIs, have secured spots on Boston’s 40-man roster. This year’s crop may lack the same star power, but it’s brimming with potential—and one name stands out in the infield debate: Mikey Romero.
And this is the part most people miss: Romero, MLB Pipeline’s No. 5 third base prospect, is a 21-year-old powerhouse who reached Triple-A despite battling injuries early in his career. The California native led all Red Sox Minor Leaguers with 54 extra-base hits in 2025 and added 20 pounds of muscle, translating to a career-high 17 home runs. Originally a shortstop, Romero’s speed has dipped as he’s matured, but his fielding remains solid. This spring is his chance to prove he’s ready for the big leagues—or if he needs more time in Triple-A. But here’s the controversial question: Can Romero’s power and potential outweigh his defensive adjustments? Let us know what you think in the comments.
Next up is switch-hitting outfielder Gilberto Castro, a 2019 international signee who’s been a steady presence in the system. While Castro doesn’t have a standout tool, his well-rounded skill set makes him a reliable reserve outfielder. After a power surge in 2024, he returned to a more balanced approach in 2025, hitting .268/.353/.426 with seven homers and 15 steals in Double-A. But here’s where it gets controversial: Is Castro’s ‘jack-of-all-trades’ profile enough to earn him a spot on the Major League roster, or is he destined to remain a depth piece? Share your thoughts below.
Then there’s Noah Song, a 28-year-old pitcher whose journey is nothing short of remarkable. Drafted in 2019 out of Navy, Song’s career was paused by military service and derailed by injuries, including Tommy John surgery in 2024. Once a top-tier starter prospect, Song now projects as a reliever after posting a 4.19 ERA and 44 strikeouts in Double-A last year. But here’s the bold take: Could Song’s four-pitch mix, including a 96 mph fastball, make him a dark horse for Boston’s bullpen in 2026? Or is his injury history too big of a red flag? Weigh in below.
Finally, there’s left-hander Andrew Wu-Yelland, who flew under the radar in 2025 despite a breakout season. After transitioning to the bullpen in 2024, Wu-Yelland dominated across High-A and Double-A, posting a 3.15 ERA, 1.07 WHIP, and 71 strikeouts. With Aroldis Chapman as Boston’s only proven lefty reliever, Wu-Yelland has a clear path to the Majors. But here’s the debate: Can he sustain his success at the highest level, or will he fade into the background like so many other relievers? Let’s hear your predictions.
As the Red Sox prepare for spring, these four NRIs offer a mix of power, potential, and perseverance. But the real question is: Which one will rise to the occasion—and which one will fall short? Share your hottest takes in the comments, and don’t forget to subscribe to the MLB Pipeline Newsletter for more insider insights!
