The Philadelphia Phillies have quietly added another arm to their pitching depth, signing right-handed pitcher Sam Carlson to a minor-league contract while the club was in the middle of its series against the Arizona Diamondbacks.
The move did not receive the attention of a major deadline acquisition, but it could prove useful for a Philadelphia organization preparing for the final stretch of the 2026 season. According to the transaction tracker, the Phillies signed Carlson on Tuesday and assigned him to Double-A Reading.
Carlson, 27, joins the Phillies after recently being released by the Houston Astros organization. The right-hander had spent part of the 2026 season with Triple-A Sugar Land, where he put together some encouraging numbers before his departure.
In 36⅓ innings with Sugar Land, Carlson posted a 3.47 ERA and struck out 43 batters. His ability to miss bats stands out, particularly for a pitcher who has increasingly moved toward a bullpen role during his professional career.
Carlson originally entered professional baseball as a highly regarded pitching prospect. The Seattle Mariners selected him in the second round of the 2017 MLB Draft, and he began his career as a starter before transitioning into relief work in 2023.
Although the headline surrounding the move describes Carlson as a three-year MLB player, the available reporting indicates that he has not established himself as a major-league regular. Instead, his experience has primarily come through the minor leagues, where he has spent seven seasons developing as a pitcher.
His minor-league résumé nevertheless gives Philadelphia an interesting depth option.
Across 96 career Triple-A innings, all coming as a reliever, Carlson has recorded a 3.94 ERA with 121 strikeouts. That strikeout ability could be one of the main reasons the Phillies decided to take a chance on him.
Philadelphia has been one of baseball’s strongest teams during the late-season push, and adding pitching depth is especially important with the postseason approaching. The organization needs to have additional arms available in case injuries, workload concerns or performance issues create openings at the major-league level.
Carlson’s assignment to Reading means he will have an opportunity to prove himself within the Phillies’ system before potentially receiving consideration for a promotion.
The signing also comes at an important point in Philadelphia’s season. The Phillies entered their Arizona series playing some of their best baseball of the year, winning six consecutive games before Wednesday’s 1-0 loss to the Diamondbacks. Philadelphia remained firmly in the National League playoff picture despite the setback.
The Phillies have also made several roster moves during the September stretch, including bringing catcher Rafael Marchán back from the injured list and adding right-handed reliever Grant Holman.
Carlson therefore represents another low-risk addition designed to increase organizational depth.
For the pitcher, the opportunity could be significant. After being released by Houston, he has quickly found another organization willing to give him a chance. If he performs well at Reading, the Phillies could eventually view him as a potential bullpen option.
Philadelphia is clearly thinking beyond its current major-league roster. With the postseason race heating up, having capable pitchers waiting in the minors can become extremely valuable.
Carlson now has another opportunity to prove that his strong strikeout numbers and recent Triple-A performance can translate into something bigger.
For now, the move remains relatively quiet, but it could become an intriguing signing if the 27-year-old right-hander finds his rhythm in the Phillies’ system.
