The Phillies’ farm system still doesn’t carry much shine, but there are a few lower-level names who could force their way into the picture by 2027. With the organization continuing to look thin in several spots, especially on the mound and in the outfield, a handful of prospects away from the spotlight could end up mattering more than expected.
Mavis Graves is one of the most intriguing. The tall left-hander was singled out by president of baseball operations Dave Dombrowski at his end-of-season press conference, and the reason is easy to see.
After three and a half years as an inconsistent starter, Graves moved to the bullpen when he was promoted late in the year to Double-A Reading. The switch paid off right away.
In 18.2 innings, he posted a 0.96 ERA, struck out 31 and walked 14. His command still needs work, but his slider has excellent spin rate, and he was a major factor in Reading’s run to the Eastern League title.
Cade Obermueller could also become part of the solution, particularly because the Phillies badly lacked dependable left-handed relief in 2026. Without Tim Mayza, the club would not have had a reliable southpaw all season.
Philadelphia will look outside the organization for help, but it may also need one of its own arms to emerge. Obermueller, a second-round pick in 2025 out of the University of Iowa, spent 2026 between Low-A and High-A.
He worked as a starter and finished with a 5.43 ERA over 58 innings in 18 appearances, but his fastball-slider mix and low arm slot could make him a fit in relief. If the Phillies decide to move him that way, he could climb quickly.
The outfield picture is just as unsettled, which puts Griffin Burkholder on the radar even if he’s still a ways away. The Phillies need help across all three outfield spots heading into 2027, with Brandon Marsh fading in the second half, Justin Crawford delivering a modest rookie season, and Bryce Harper moving back to first base.
A free-agent move or two seems likely, but an internal option would help. Burkholder, who turned 21 during the season, spent the year at Low-A and High-A and posted a .672 OPS in 87 games.
The 2024 second-rounder doesn’t have much momentum right now, but the Phillies gave him an overslot $2.5 million bonus for a reason. He has legitimate five-tool upside, and if things start to click, the path won’t be blocked for long.
Carson DeMartini is another name worth tracking. The 23-year-old from Virginia Beach might have finished the year in Triple-A if not for an injury that slowed him.
When he returned to Reading in August, he hit .308/.490/.598. He also plans to keep his season going by playing winter ball with the Criollos de Caguas of Puerto Rico’s Roberto Clemente Professional Baseball League.
If Bryan Rincon or Aidan Miller slip for any reason, DeMartini would be next in line among the Phillies’ infield prospects. Right now he looks more like a bench bat than an everyday answer, but he could fill that kind of role if he’s needed in the majors.
The Phillies’ lower minors may not be loaded, but there are still a few players who could move faster than expected if the right opening appears.
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