Giants’ Trade Deadline Bolsters a Vastly Improved System

There’s no denying the San Francisco Giants have built one of the more talented farm systems in baseball. After fielding an underwhelming system for close to 15 years, they’ve completely turned around the future of their organization.

Whether it’s through international signings, the draft, or undrafted free agents, they’ve found a plethora of ways to add significant upside to the system. Not only have international signees Josuar Gonzalez, Luis Hernandez, and Jhonny Level burst onto the scene as some of the best teenage prospects in the sport, but the Giants also put together one of the better draft classes in baseball this year.

Names like Jackson Flora, Carson Bolemon, and Kaden Waechter brought some much-needed pitching depth to an organization that lacked top-tier arms throughout the farm.

Fast-forward to the trade deadline, and San Francisco was handed another prime opportunity to build on what now looks like a top-10 farm system in baseball. With one of the worst records in the National League, they were an obvious seller in a season full of buyers.

They took advantage, moving a handful of their most notable names.

• Luis Arraez, Caleb Kilian -> Philadelphia Phillies

• Robbie Ray -> San Diego Padres

• Heliot Ramos -> New York Yankees

• Erik Miller, Carlos Gutierrez (prospect) -> Boston Red Sox

• Tyler Mahle -> Atlanta Braves

Of course, we’ll have to wait years to see just how well Buster Posey did in terms of the value he received. However, the initial returns are encouraging, considering both the public reaction and the rankings of the prospects shipped to San Francisco.

Let’s break down the prospects who most contributed to bolstering a farm system that’s already on the rise.

RHP Ramon Marquez

Trade Acquired In: Luis Arraez, Caleb Kilian to Phillies

Initially, fans probably shouldn’t have expected a prospect this talented in return for two months of Luis Arraez, even with the jump in value after a defensive anomaly for the NL batting average leader. However, attach a breakout reliever with years of team control, and suddenly you can land a young right-handed pitching prospect who once ranked among the top names in the Phillies’ system.

Ramon Marquez is an arm who’s completely broken out in 2026 and should find himself on Just Baseball’s next Top 100 Prospects update. Before this year, he owned a 4.42 ERA in 14 games between the Complex League and Low-A.

However, thanks to a clear uptick in stuff, Marquez has pitched to the tune of a 1.68 ERA and 2.30 FIP across 59 innings between the two Single-A levels. The right-hander’s 41.9% strikeout rate leads all minor league pitchers with at least 50 innings pitched, while his 14.19 K/9 ranks sixth.

At just 20 years old, he should slide in as the organization’s second-best pitching prospect behind Flora.

LHP Henry Lalane

Trade Acquired In: Heliot Ramos to Yankees

The Giants didn’t need to trade Heliot Ramos, but clearly they saw a prime opportunity to add another pitching prospect in the midst of a strong 2026 campaign to the top of their system. Lalane threw just 31.2 innings across the 2024 and 2025 seasons, simply struggling to stay on the field.

It’s been a completely different story in his first healthy season in quite some time, and he quickly established himself as one of New York’s top pitching prospects. Across 78 innings (15 starts) between Low-A and High-A, Lalane owns a 2.77 ERA with a 31.6% strikeout rate.

He doesn’t necessarily induce a ton of chase or whiffs — which will likely need to improve — but his fastball has reached the upper 90s this season, and he’s also taken a step forward in the strike-throwing department.

He’ll join Jacob Bresnahan and Carson Bolemon as some of the highest-touted southpaws in the system, all of whom appear to have bright futures.

SS Joniel Hernandez

Trade Acquired In: Robbie Ray to Padres

The Giants have a real argument for having the most talented shortstop room in Minor League Baseball. With three Top 100 prospects — Gonzalez (MLB No. 45), Hernandez (MLB No. 62), and Level (MLB No. 64) — alongside last year’s 13th overall selection in the draft, Gavin Kilen, it’s clear they’re loaded at the position.

The latest addition to that group could find himself on a Top 100 list over the next few years as well. Joniel Hernandez was the Padres’ most talented — and expensive — international signee from this past January’s class, and at 17 years old, he has dominated the DSL.

Prior to the deadline, he slashed .316/.439/.519 with four home runs and a 128 wRC+. He may not find himself in the same class as Josuar Gonzalez in terms of DSL hype, but he’s not far behind.

The Giants have seen strong early returns from fellow 17-year-old Luis Hernandez, which should excite fans about what this Hernandez can look like once they get their hands on him.

He’s made his presence felt early as well. In his first two games with the Giants organization in the DSL, he’s three-for-five with a home run, double, and two walks.

Other Notable Prospects Acquired:

• RHP Miguel Mendez (Padres)

• SS Kaeden Kent (Yankees)

Final Thoughts

While it may be a bit early to call it a top-five system in baseball, there’s no shortage of talent and upside throughout San Francisco’s minor league affiliates. After some breakout seasons, an impressive draft class, and a successful deadline, Buster Posey has excelled at building up the farm system.

With it being virtually barren since Posey was a prospect himself alongside names like Madison Bumgarner, Brandon Crawford, and Brandon Belt, the future in San Francisco finally looks bright again.

Despite it being a lost season at the big-league level, there’s no denying the additions made through subtraction a few days ago were necessary moves.