The Philadelphia Phillies‘ biggest and most consequential move at the trade deadline was acquiring second baseman Luis Arraez from the San Francisco Giants.
MLB insider Robert Murray listed his favorite deals ahead of the trade deadline. Topping the list was the Phillies’ move to land Luis Arraez and Caleb Kilian. Philadelphia sent pitching prospects Ramon Marquez and Marty Gair to the Giants.
Here’s Murray’s analysis on the trade:
“This was my favorite trade of the deadline. After I reported that the Phillies were interested in Arraez, I received a few phone calls and texts from folks curious where Arraez would factor defensively in Philly. The educated guess was second base. But the real answer was that the Phillies wanted his bat. Badly.”
Badly best describes how much they wanted to land Arraez. So much to the point they were very willing to make significant accommodations to add him to their lineup.
Luis Arraez Trade Gets Strong Returns Early
The Luis Arraez trade has led to a massive shakeup of the Phillies’ defensive alignment. Bryson Stott moved to third base, Alec Bohm to first base, and Bryce Harper to right field. The process behind the move is to give the club its best offensive lineup on a given night without sacrificing too much on defense.
So far, the move has paid off, as Arraez has a hit and driven in a run in each of his first three games with his new team. The last Phillie to achieve that feat was Mike Benjamin in 1996, per MLB.com’s Todd Zolecki and Sarah Langs.
The move has already left a strong impression on Arraez’s new teammates and manager. The 29-year-old brings energy and the type of professional at-bats that should make the Phillies’ lineup more dangerous to navigate.
Arraez had to wait until late in the offseason to land a major league deal. His tenure with the San Diego Padres had been a mixed bag, as he struggled with a new position. The 29-year-old waited for an opportunity to move back to his more natural second base and made the most of it.
In 905.2 innings at the keystone, Arraez has been rated at +11 Outs Above Average. While the Phillies had to make significant defensive changes, most of the benefits will come with their infield.
The Hidden Value in the Luis Arraez Trade
GettyPHILADELPHIA, PENNSYLVANIA – AUGUST 4: Caleb Kilian #56 of the Philadelphia Phillies throws a pitch in the top of the ninth inning against the Washington Nationals at Citizens Bank Park on August 4, 2026 in Philadelphia, Pennsylvania. The Phillies defeated the Nationals 5-0. (Photo by Mitchell Leff/Getty Images)
Luis Arraez will be the most discussed player in the deal, but he wasn’t the only one the Giants sent to Philadelphia in that trade.
Caleb Kilian has a chance to help the Phillies’ bullpen, which is lacking capable late-inning arms. The 29-year-old is controllable through 2031 and has succeeded in this role with San Francisco this year.
The Phillies lack proven, capable arms that can form the bridge in front of All-Star closer Jhoan Duran. Brad Keller is out for the foreseeable future with a torn UCL in his right elbow. Orion Kerkering hasn’t gotten the job done frequently enough in Keller’s absence.
There should be an opportunity for Kilian to establish himself in that role. That in itself is a major game-changer for the Phillies bullpen. Should the right-hander reach his ceiling, this trade has a chance to be a big one for the club.
Phillies Praised for Deadline Deal to Land Giants All-Star by MLB Insider