The San Francisco Giants traded veteran second baseman Luis Arraez to the Philadelphia Phillies on Monday, six hours before Major League Baseball's trade deadline. In return, the Giants received pitching prospects Ramon Marquez and Marty Gair.
Marquez, 20, has emerged as the Phillies' No. 4 prospect. Since signing as an international free agent from Mexico in 2025 for $10,000, he has posted a 1.68 earned run average primarily as a starting pitcher across Single-A and High-A this season. Gair, 23, has exclusively pitched in relief since being drafted in 2023, recording a 4.50 ERA with six saves in 30 appearances for Single-A.
Arraez, 29, was a notable performer for the Giants during a season widely considered one of the franchise's worst. As San Francisco fell out of playoff contention, he became one of the most sought-after trade targets.
The move subtracts an exciting player from the Giants' lineup for the remainder of the season. Arraez's acquisition by San Francisco was initially met with mixed reactions but is now viewed as one of the more astute moves by President of Baseball Operations Buster Posey. However, with many of Posey's other acquisitions not panning out, he was compelled to pursue long-term value.
San Francisco's options at second base have been further limited by an injury to Casey Schmitt, who tore his left meniscus and may miss the rest of the season. Schmitt would have been a natural fit at the position for the Giants in Arraez's absence.
Arraez joins the Phillies as a rental player, having signed a one-year, $12 million contract with the Giants, the only team to offer him an opportunity to play second base. His defensive reputation had previously relegated him to first base and designated hitter roles for the past two seasons, with his last regular second base play occurring in 2024.
Despite earlier struggles at the plate by his own high standards as a contact hitter, Arraez has experienced a career resurgence this season. He has re-established himself among the National League leaders in batting average and is known for his exceptional ability to put the ball in play with infrequent strikeouts. This mid-career renaissance earned him his fourth All-Star selection.
In Philadelphia, Arraez reiterated his desire to play exclusively at second base, a position he has not played regularly since 2024. He will now have that opportunity with a team currently in contention. His development and ability to maintain his defensive performance without the guidance of fielding coach Ron Washington, whom Arraez described as a "grandfather" figure, will be closely watched as he approaches potential free agency this winter.