The Philadelphia Phillies have acquired veteran infielder and three-time batting champion Luis Arraez from the San Francisco Giants at the Aug. 3 Major League Baseball trade deadline, ESPN reports. Right-handed reliever Caleb Kilian is also going from the Giants to the Phillies in the trade. Going back to the Giants, according to the Athletic, are pitching prospects Ramon Marquez and Marty Gair. 

Arraez, 29, has enjoyed a strong rebound season in 2026 for the Giants: 

That’s good for an OPS+ of 127, which, if sustained, would be close to a career high for Arraez, a four-time All-Star. That’s a positive development for Arraez, who in 2025 dipped to a slash line of .292/.327/.392 with the Padres and raised concerns about premature decline at the plate. After parts of eight seasons in the majors, Arraez is the active career leader in batting average with a mark of .318. 

This season marked a return to second base for Arraez after being a primary first baseman for the prior two seasons. Leading up to the deadline, Arraez professed a strong preference for remaining at second base in the event of a trade out of San Francisco. 

Arraez is on a one-year contract and is owed the balance of a $12 million salary for 2026. He’ll re-enter the free agent market this coming offseason. 

Kilian, 29, this season has pitched to a 4.26 ERA and a 3.59 FIP in 44 ⅓ innings for the Giants with 53 strikeouts against 18 unintentional walks. He had rookie eligibility coming into the current season, so he’s controllable for several years to come. 

CBS Sports will have more to come on this story.