De Vries highlights burgeoning new A's among Top 30 prospects

Seldom does a team have an opportunity to obtain another club’s player who is universally touted as a potential future superstar. At this year’s Trade Deadline, however, the Athletics landed one of baseball’s premier prospects by acquiring Leo De Vries from the Padres in a blockbuster deal that sent closer Mason Miller to San Diego.

“He checks a lot of boxes,” A’s general manager David Forst said of De Vries. “And he’s checked those boxes at a really young age, which, historically, projects incredibly well for guys who’ve not only had success, but have had All-Star-level success in the big leagues.”

De Vries, who has since joined High-A Lansing and continues to more than just hold his own as an 18-year-old, remained the A’s No. 1 prospect and the No. 3 overall prospect in baseball in MLB Pipeline’s midseason re-rank.

The organization is much deeper than De Vries, though. Joining the switch-hitting shortstop on MLB Pipeline’s Top 100 Prospects list is a pair of talented left-handers in Jamie Arnold, whom the A’s selected 11th overall in the 2025 MLB Draft and could be in line for a quick rise through the system in the vein of Nick Kurtz, and Gage Jump, currently dominating at Double-A just one year into his professional career.

Here’s a look at the A's top prospects:

1. Leo De Vries, SS (MLB No. 3)
2. Jamie Arnold, LHP (MLB No. 36)
3. Gage Jump, LHP (MLB No. 58)
4. Luis Morales, RHP
5. Colby Thomas, OF

Complete Top 30 list >>

Biggest jump/fall

Here are the players whose ranks changed the most from the preseason list:

Jump: Gage Jump, LHP (Preseason: 15 | Midseason: No. 3) -- The 22-year-old has broken through the Top 100 list on the strength of a dominant debut season. He started out at High-A Lansing, where he posted a 2.32 ERA in six games (five starts) with 45 strikeouts across 31 innings, then earned a promotion to Double-A Midland, where he’s pitched even better, recording a 1.81 ERA in 15 games (14 starts) with 71 strikeouts across 64 2/3 innings.

Fall: Rodney Green Jr., OF (Preseason: 21 | Midseason: NR) -- The A’s were excited to land Green in the fourth round of the 2024 MLB Draft after he showed off a tantalizing power-speed combo during his three college seasons at Cal. But those tools also came with some serious swing-and-miss concerns, which have also shown up this year, striking out 131 times through the first 95 games of a season in which he began at High-A Lansing and was demoted back to Single-A Stockton after massive struggles at the plate. The recent influx of talent acquired by the A’s through the Draft and trades also led to Green’s drop in the rankings.

New to the list

Here are the players added to the Top 30 from outside the organization:

No. 2: Arnold, LHP (Draft)
No. 6: Braden Nett, RHP (Trade)
No. 8: Devin Taylor, OF (Draft)
No. 10: Henry Baez, RHP (Trade)
No. 14: Gavin Turley, OF (Draft)
No. 18: Eduarniel Núñez, RHP (Trade)
No. 29: Zane Taylor, RHP (Draft)
No. 30: Bobby Boser, INF (Draft)

Best tools

Players are graded on a 20-80 scouting scale for future tools – 20-30 is well below average, 40 is below average, 50 is average, 60 is above average and 70-80 is well above average. Players in parentheses have the same grade.

Hit: 60 -- DeVries
Power: 60 -- Thomas (Tommy White, Turley)
Run: 65 -- Henry Bolte
Arm: 60 -- Daniel Susac (Turley, Ryan Lasko, Shotaro Morii)
Defense: 60 -- Ryan Lasko
Fastball: 60 -- Morales (Arnold, Nett, Núñez, Taylor)
Curveball: 55 -- Jump
Slider: 70 -- Núñez
Changeup: 55 -- Mason Barnett (Will Johnston, Taylor)
Control: 55 -- Wei-En Lin (Arnold, Jump, Gunnar Hoglund)