What the SF Giants are getting in the Luis Arráez trade with the Phillies

On Monday morning, the SF Giants shipped Luis Arráez and Caleb Kilian to the Philadelphia Phillies. In the deal, they received a pair of pitching prospects in Ramon Marquez and Marty Gair. What are they getting in the trade?

In the days leading up to the trade deadline, it felt like a certainty that Arráez would be traded. He was on an expiring deal and garnered plenty of interest.

That said, rentals do not always generate a ton of value at the trade deadline, even for ones who have performed as well as the veteran infielder has in 2026. The Giants included Kilian to sweeten the deal, and now the Phillies have added a controllable arm to their bullpen.

The Giants had targeted Ramon Marquez in trade talks. He is a 20-year-old pitcher who has already experienced success in High-A. He, along with Marty Gair, will now join the Eugene Emeralds down the stretch. The Emeralds will compete for a Northwest League championship in about six weeks after securing a first-half title.

Newest SF Giants prospect Ramon Marquez offers some of the highest upside of any pitching prospect in the organization

The Emeralds' roster might look a little different due to promotions down the road. If Marquez remains at High-A, he would pair nicely with Jacob Bresnahan at the top of that rotation.

Marquez was signed out of Mexico for $10,000 during the 2025 international free agency cycle. He skipped the Dominican Summer League and went stateside in his first full pro year. The results were promising. He posted a 4.42 ERA, 1.23 WHIP, 11.8 K/9, and a 4.24 SO/W rate in 55 innings split across two levels, including Low-A.

The right-handed pitcher returned to Low-A in 2026 and recorded a 1.86 ERA in 29 frames before earning a promotion to High-A. Since his promotion, Marquez has tallied a 1.50 ERA, 0.66 WHIP, 13.8 K/9, and a 5.11 SO/W rate in 30 innings.

On the mound, Marquez throws from a three-quarters arm slot. He flashes a mid 90's sinker with plenty of late movement. He pairs this with a low 80's changeup and an upper 80's cutter. The changeup is his go-to pitch, and it gets late, fading action. Hitters struggled to make any contact against it. Marquez fills the zone with his pitches and will need to develop his cutter to stick as a starter.

The Giants also received hard-throwing reliever Marty Gair. Gair was a 13th-round pick by the Phillies in 2023. He missed the 2024 season due to an injury and has spent the past two seasons in the lower minors. In 2026, he has pitched to a 4.50 ERA, 1.16 WHIP, 16.5 K/9, and a 3.00 SO/W rate in 36 innings.

Gair features an upper 90's fastball that can consistently reach triple digits. The fastball has great pitch shape characteristics, including above-average extension and carry up in the zone. He mixes in a slider as well, but that pitch is a work in progress. He also struggles with control. Gair is a reliever, but if his control improves, his upside is in a leverage role.

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