SAN FRANCISCO — The San Francisco Giants completed a significant roster‑shaping trade Monday, acquiring highly regarded right‑handed pitching prospect Ramón Marquez and fellow right‑handers Marty Gair and Harrison Kreiling from the Philadelphia Phillies in exchange for infielder Luis Arraez and reliever Caleb Kilian. The deal delivers San Francisco one of the most coveted young arms in the minors while Philadelphia adds an All‑Star bat and a versatile bullpen piece for its postseason push.
Marquez Arrives as One of Baseball’s Fastest-Rising Pitching Prospects
Marquez, 20, has been one of the breakout performers in the Phillies’ system this season and is widely considered a top‑tier pitching prospect. MLB.com and Baseball America ranked him No. 4 in Philadelphia’s system, while FanGraphs placed him No. 3 and 67th overall in baseball.
Across two levels, Marquez has dominated. He posted a 1.86 ERA with 47 strikeouts in 29 innings at Single‑A Clearwater before earning a promotion to High‑A Jersey Shore, where he has been even better: 3–1, 1.50 ERA, 46 strikeouts, a .115 opponents’ average, and a 0.67 WHIP in six starts.
Marquez has earned three Pitcher of the Week awards this season — once in the Florida State League and twice in the South Atlantic League — underscoring his rapid ascent. Signed as an international free agent in January 2025, he owns a career 3.00 ERA, 165 strikeouts, and a 13.03 K/9 across 26 minor league games.
Gair Adds High-Leverage Relief Potential
Gair, 23, recently advanced to High‑A Jersey Shore, where he struck out eight batters in three scoreless innings across two outings. Before his promotion, he posted a 43% strikeout rate — the highest in the Florida State League among pitchers with at least 30 innings — while holding opponents to a .159 average at Single‑A Clearwater.
A 13th‑round pick in 2023 out of Florida Southwestern State College, Gair has compiled a career 4.43 ERA, 106 strikeouts, and a 15.14 K/9 across 54 minor league appearances.
Kreiling Shows Promise in Early Professional Action
Kreiling, 24, has impressed in limited work during his first professional season, recording a 1.69 ERA with 16 strikeouts in 10.2 innings between the ACL Mariners and Single‑A Inland Empire. The Omaha native was selected in the 17th round of the 2024 draft out of the University of Nebraska Omaha.
Arraez Heads to Philadelphia as NL Batting Leader
Arraez, 32, departs San Francisco amid another standout offensive season. The 2026 All‑Star leads the National League with a .324 batting average, and his 136 hits rank second in MLB. He has added 23 doubles, seven triples, four home runs, 43 RBI, and an .800 OPS across 105 games.
Acquired from the Angels last November, Arraez has continued to be one of baseball’s premier contact hitters and table‑setters.
Kilian Provides Phillies a Versatile Relief Arm
Kilian, 29, has been one of the Giants’ most frequently used relievers, appearing in a team‑leading 45 games while posting a 3–6 record, 4.26 ERA, and eight saves in 11 chances. He has logged 44.1 innings and allowed 21 earned runs.
The trade marks a strategic shift for San Francisco, which adds three young arms headlined by one of the sport’s most promising pitching prospects, while Philadelphia acquires an elite bat and a bullpen reinforcement for its stretch run.
