With spring training right around the corner, it’s easy to lock in some definites for the Boston Red Sox — Garrett Crochet is an ace, Roman Anthony is a rising star, Ceddanne Rafaela is one of the best defenders in baseball, and Carlos Narváez is the captain.
What about the prospects, though? They tend to be a bit more like wild cards. Luckily for them, the Red Sox have some questions in their lineup. That could lead to a breakout prospect making a name for himself in Spring.
The obvious positions of need are third base and second base. So you might think we’re going to talk about Mikey Romero, Tyler McDonough, Franklin Arias, Ahbram Liendo, or Marvin Alcantara. But we're taking this in a different direction.
The Red Sox don’t need outfielders at the moment. The major league roster currently holds Anthony and Rafaela, as well as Wilyer Abreu, Jarren Duran, and Masataka Yoshida. You can make a pretty strong argument that they should trade one (or even two) in order to find solutions elsewhere. Especially when you consider that Nate Eaton and Romy Gonzalez can also man the outfield if needed. Oh, and Kristian Campbell might be moving there full-time.
Just because a position is loaded doesn’t mean someone else can’t make a name for themselves, though. That’s where Allan Castro comes in.
Red Sox outfield prospect Allan Castro seems poised for spring training breakout
The Red Sox have no shortage of talented outfielders in the system. You can even go deeper into the minor leagues to see Justin Gonzales, Miguel Bleis, Enddy Azocar, Nelly Taylor, Yophery Rodriguez, and more. That's just another reason Castro doesn’t get the hype he deserves. If he were in a system not so loaded at the position, Castro would likely be heralded by the fanbase.
The switch-hitter slashed .268/.353/.400 with 20 doubles, two triples, and seven home runs in Double-A last season. He drove in 37 runs, scored 43 more, and stole 15 bases in 93 games. Castro sacrificed some of his home run power to raise his average and OBP from the prior year, while also cutting back on strikeouts.
Despite the low home run total in 2025, there’s still good raw power in his bat. Castro might not dominate a single area of the game, but he can give you a bit of everything. There’s 20 homer power, 20 steal speed, good defense in the corner outfield spots, a solid arm, and an ability to get on base.
Castro enjoyed a breakout campaign in 2023, but has flown under the radar since then. Spring training feels like the perfect time for him to make a name for himself. While not on the 40-man roster, Castro could be a 2026 call-up at some point. Starting the season in Triple-A would make sense, so there’s a path.
The Red Sox might have an overabundance of outfielders, but Castro should get a lot of playing time in spring. He’s one of the more intriguing prospects who received a non-roster invite to camp, which shows the Red Sox want to see as much of him as possible.
Castro’s ability to limit strikeouts, showcase good power, and swipe some bags could make him a versatile option at any point in a game. While there’s no major strength to his game, Castro doesn’t have a glaring weakness. That should help keep him from getting exploited while putting together a strong reel in March. We could see Castro’s stock rise drastically in the fanbase with a big showing this spring.