Major League Baseball announced the 2025 Arizona Fall League rosters on Wednesday, and among Diamondbacks listed was pitcher Drey Jameson.
Eight Diamondbacks will play for the Salt River Rafters:
– RHP Kyle Amendt
– RHP Yordin Chalas
– RHP David Hagaman
– RHP Drey Jameson
– RHP Jacob Steinmetz
– C Kenny Castillo
– INF Jansel Luis
– OF Jack Hurley
Luis (No. 12), Hagaman (No. 15) and Chalas (No. 21) are top 30 prospects in the farm system ranked by MLB Pipeline.
A common thread with these eight players is they all spent time on the injured list this season, and the AFL will allow them to make up reps.
The Salt River Rafters roster players from the Angels, Pirates, Red Sox, Rockies and Diamondbacks. Colorado first baseman/outfielder Charlie Condon is the highest-ranked prospect on the team at No. 58 overall.
The Rafters’ first game is on Oct. 7 at Salt River Fields against Glendale. The Fall-Stars Game is scheduled for Nov. 9, and the AFL championship game is on Nov. 15.
Details on Diamondbacks headed to Arizona Fall League
Drey Jameson
Jameson’s comeback season after he missed all of 2024 while recovering from Tommy John surgery did not materialize the way anyone would have hoped.
Jameson returned to game action in spring training, started the year in Triple-A Reno and made his way to the big leagues, but an injury once again sidelined him.
His last appearance in affiliated ball was on May 18, after which he made two appearances in the complex league before getting shut down. A loose body in his right elbow was causing discomfort.
At his best, Jameson can pump a 100 mph heater with a wipeout slider. He came up as a starting pitcher and was a swing man in 2023 before undergoing surgery.
David Hagaman
Hagaman is the lone trade deadline acquisition on the roster, as he came over from Texas in the Merrill Kelly deal.
The 22-year-old has started his tenure in the system well, making five starts in High-A Hillsboro with a 3.15 ERA, 27 strikeouts and four walks in 20 innings pitched.
The 6-foot-4 right-hander was a fourth-round pick out of West Virginia last summer. After recovering from Tommy John surgery, he had thrown 42.1 innings total this season.
David Hagaman – 8/20/25 – 5IP 1H 1ER 0BB 8K. 0 video on X of this guy. pic.twitter.com/IHVbuCwANg
— Matt Ahern (@MattyBackpack) August 24, 2025
Jansel Luis
Luis has received buzz as an underrated Diamondbacks prospect. The Athletic’s Keith Law ranked him seventh in the system entering this season, and MLB Pipeline had him sixth last year.
The 20-year-old, switch-hitting infielder signed with the Diamondbacks in 2022 and has put up capable offensive numbers while gaining experience at different spots around the infield. This year, Luis slashed .304/.342/.422 with five home runs and 22 stolen bases in Hillsboro, limiting the strikeouts to 16%.
With solid tools and room to grow into a six-foot frame, there could be more power coming as he enters his 20s.
JANSEL LUIS TIES IT IN THE 9TH! HOPS ALIVE!!!#AllHoppedUp pic.twitter.com/bLuu3JATJf
— Hillsboro Hops (@HillsboroHops) August 17, 2025
Yordin Chalas
Chalas rose up prospect boards with a strong finish to the 2024 season as a reliever (2.67 ERA and 24 strikeouts in 16.1 innings to close the year). He combined a fastball that can hit upper 90s mph with a plus slider and struck out nearly a third of batters he faced between two levels of Single-A.
This year, the Diamondbacks moved him into a starting role, in part to help him develop and find more ways to retire hitters.
With growing pains to be expected, the 21-year-old worked a 6.14 ERA as a starter in Hillsboro and has moved back into a bullpen role in Double-A Amarillo.
Struck out and haunted by heat. 🧛♂️⚡
Yordin Chalas has his first Double A strike out!! pic.twitter.com/VzE6b9dOTS
— Amarillo Sod Poodles (@sodpoodles) August 31, 2025
Kyle Amendt
Given the number of reliever injuries along with Amendt’s status as someone who entered the year in big league camp and started in Triple-A Reno, it’s not hard to imagine he would have made his MLB debut at some point had he not suffered a shoulder strain.
The 25-year-old with an overhand delivery similar to former Diamondback Josh Collmenter returned to the mound for Reno on Aug. 29.
A 2023 ninth-round pick out of Rice, Amendt worked a 2.86 ERA in 44 innings pitched last season, and he started this year with 13 straight scoreless outings.
Amendt and Jameson are players to watch in particular as potential bullpen options for the 2026 Diamondbacks.
Jacob Steinmetz
Steinmetz has not pitched this season after he reached High-A in his age 20 campaign last year.
A third-round pick in 2021 out of high school, Steinmetz is 6-foot-6 and 230 pounds with a well-graded fastball and curveball. In 107.2 innings last year, Steinmetz struck out 113 batters with 42 walks and a 4.01 ERA.
Kenny Castillo
Castillo, 21, has not played since Aug. 20, but he had heated up offensively in July.
Castillo won the organization’s Minor League Player of the Month award after hitting .354 with five doubles and a couple home runs for Hillsboro after a slow start.
Jack Hurley
Hurley was a third-rounder out of Virginia Tech in 2024 and has reached Double-A.
A speedy, left-handed outfielder, Hurley has played 64 games in Amarillo this year and really got going in August (.320 average) after he missed all of June and part of July.
Considered a quality defender, Hurley has work to do at the plate to lower a 42.2% strikeout rate this season.
¡Adios Pelota! 💣
Jack Hurley Homers To Make it 5-1 Soddies! pic.twitter.com/TYYk0Pgq7z
— Amarillo Sod Poodles (@sodpoodles) August 27, 2025
Who are the top prospects heading to the Arizona Fall League?
There are 13 top 100 prospects (MLB Pipeline) on AFL rosters, headlined by No. 2 Kevin McGonigle, a shortstop with the Detroit Tigers. He will play for Scottsdale.
No. 4 Sebastian Walcott, a shortstop with the Texas Rangers, is on Surprise, while No. 12 Josue De Paula of the Los Angeles Dodgers will play outfield for Glendale.
