The 10 Youngest Players In The 2025 Arizona Fall League

The Arizona Fall League’s initial rosters are out and, as usual, they are dotted with plenty of talented prospects from all 30 organizations, ranging from youngsters who need more seasoning and players coming back from injury to Top 100 Prospects.

Below, we break down the youngest players on each of the six AFL rosters, including a trio of teenage catchers and a five-tool shortstop who is among the best prospects in the game.

Brailer Guerrero, OF, Rays (19 years old)

The youngest player in the Fall League also is one of its most intriguing. The slugging outfielder showed flashes of his potential this season at Low-A Charleston. Unfortunately, as has been the case throughout his career, he missed time with injuries and was limited to just 50 games. The time in the desert will give him more at-bats and exposure to a more advanced caliber of pitching.

Ethan Salas, C, Padres (19 years old)

Because of an injury that cost him most of the season, Salas is back for another turn in the Fall League. After a whizbang season in 2023, Salas’ development has been stalled for the last two years. He was middling with Peoria last year, and this time around he’ll look to get back on track and gain some momentum heading into 2026.

Sebastian Walcott, SS, Rangers (19 years old)

Walcott entered the year with a chance to challenge for the No. 1 spot on the Top 100 heading into 2026. He won’t reach those heights, but the potential five-tool shortstop put together a solid season in the Texas League as one of its youngest players. He’ll get a chance to show off his gifts with Surprise against craftier pitchers than he faced in Double-A.

Juan Flores, C, Angels (19 years old)

Flores didn’t produce much with the bat this season at High-A Tri-City—although he was one of just six teenaged catchers to finish the year with double-digit home runs—finishing with a line of just .207/.283/.341 in 89 games. He hit the ball decently hard but has a long way to go in terms of refining his bat-to-ball skills.

Alfredo Duno, C, Reds (19 years old)

Duno produced an extraordinarily loud season in the Florida State League, which he led in nearly every offensive category that doesn’t require a speed component. When healthy, this is the kind of prospect Duno can be: An offensive threat at one of the game’s premium positions.

Starlyn Caba, SS, Marlins (19 years old)

Caba was the jewel in the trade that brought Jesus Luzardo from Miami to Philadelphia. He also was the No. 1 prospect in the Florida Complex League in 2024. He missed a large chunk of the season on the injured list and didn’t produce much when healthy. No matter what he does at the plate, his glove should be the best in the AFL.

Justin Chambers, LHP, Dodgers (20 years old)

Chambers came to the Dodgers via Milwaukee in the trade that sent Bryan Hudson to the Brewers. The lefthander earned a big bonus when he was drafted out of high school and might just be beginning to scratch at the potential both of his clubs have seen in him. His slider was particularly nasty this year. He threw the pitch 125 times this year and got a miss rate of 75.6%.

Josue De Paula, OF, Dodgers (20 years old)

De Paula is the best of Los Angeles’ bunch of talented outfielders who spent most of the year at High-A Great Lakes. Although he missed a little bit of time toward season’s end, the Futures Game MVP finished his time in the Midwest League with a sterling line that included 16 doubles, 12 home runs, 81 walks and 32 stolen bases.

PJ Morlando, OF, Marlins (20 years old)

Morlando was the Marlins’ first-round pick in 2024 out of high school in South Carolina. Like many players on this list, he is in the Fall League in part to make up for lost time. Morlando’s season was limited to just 52 games thanks to a pair of stints on the injured list. He struggled when healthy, posting a .714 OPS with five home runs.

Tony Blanco Jr., OF, Pirates (20 years old)

Blanco is one of the sport’s biggest power brokers, with exit velocities that rival anybody in the game—big leaguers included. If and when he starts making more contact, that thump will start showing up in games even more often. He’s made strides in that regard this year but still has a long way to go.