The Philadelphia Phillies are acquiring three-time batting champion Luis Arraez from the San Francisco Giants, according to sources told ESPN‘s Jeff Passan. The second baseman joins his fifth team in five years.
Along with Arraez, the Phillies receive right-handed reliever Caleb Kilian. In return, the Giants get two minor leaguers: top pitching prospect Ramon Marquez and reliever Marty Glair. Philadelphia also made a separate move Monday morning, acquiring left-handed reliever Brooks Raley from the New York Mets for minor league right-hander Luke Gabrysh and minor league outfielder John Spikerman.
Arraez, slated to become a free agent after this season, returned to second base this year with San Francisco. His defense at the position ranks among the best in baseball. He also has experience at first base, having played there for the San Diego Padres in 2024 and 2025, yet he has made clear he does not want to move off second.
Multiple outlets reported that the Phillies plan to use Arraez as their primary second baseman. That would trigger a cascade of defensive shifts. Bryson Stott, the current regular second baseman, could slide to third base, sending Alec Bohm to first and Bryce Harper to the outfield.
Arraez doesn’t provide much over-the-fence power or draw many walks, but nobody is better at putting the ball in play. The four-time All-Star likely will lead MLB in lowest strikeout rate for a fifth consecutive season. His career has been a tour: Miami Marlins traded him to San Diego on May 4, 2024. He left as a free agent after 2025, signing with San Francisco on Feb. 9. Now Philadelphia.
For now, the Giants have held Arraez out of the lineup since Saturday because of cramps, a move termed precautionary heading into the trade deadline. ESPN’s Kiley McDaniel and David Schoenfield contributed to this report.