The 2026 MLS offseason is in full swing, and Atlanta United is waste no time refining its roster for a pivotal comeback season. In a move aimed at accelerating the development of one of their brightest defensive prospects, the club announced on Wednesday, January 21, 2026, that Kaiden Moore has been loaned to the Philadelphia Union for the entirety of the 2026 season.2
Moore, an 18-year-old Macon native, officially became a Homegrown signing on January 1, 2026.3 However, with the first-team depth chart currently crowded by veterans like Stian Gregersen and Ronald Hernández, the front office has opted to send Moore to a Philadelphia system renowned for its ability to refine young defensive talent.
The Rise of the Macon Native: Kaiden Moore’s Journey
Kaiden Moore’s ascent through the Atlanta United Academy has been nothing short of clinical. Since joining in 2022, he has become a symbol of the club’s “Pathway to the Pros.” Moore was a linchpin of the 2023 U-16 team that dominated with a 22-1-1 record to secure the MLS NEXT Cup.4
His “clutch” gene became legendary in 2025 when he stepped up during the Generation adidas Cup to bury the game-winning penalty in a high-stakes shootout against Inter Milan’s U-18 team. That poise under pressure earned him his professional debut with ATL UTD 2 and eventually his Homegrown contract.
Across two seasons with the 2s, Moore showcased elite technical ability for a center-back, posting:
- 89.5% passing accuracy
- 66.7% aerial duel win rate
- 17 starts in 24 professional appearances5
Why the Philadelphia Union?
This isn’t Moore’s first trip to the City of Brotherly Love. He spent the tail end of the 2025 season on a short-term loan with Philadelphia Union II, making two appearances in MLS NEXT Pro.6 The Union’s head of recruitment, Ernst Tanner, has a history of targeting high-ceiling defenders, and the loan includes a permanent transfer option, signaling that Philly sees Moore as a potential long-term piece of their backline.
From Atlanta’s perspective, Moore will be considered an off-roster Homegrown for the 2026 season. This allows the club to retain his rights while freeing up a roster spot and budget space during this critical rebuild. For more on how the club is managing its cap space, see our breakdown of the 2026 General Allocation Money totals.
[Image: The Philadelphia Union logo and Atlanta United logo side-by-side with a “Loan Deal” banner. Alt text: Graphic representing the Kaiden Moore loan deal between Atlanta and Philadelphia.]
What This Means: Tactical Development and Roster Math
The decision to loan Moore is a calculated risk. While fans hate to see a local “Macon native” leave the state, the Philadelphia Union’s defensive methodology is arguably the best in MLS. Moore will likely see significant minutes for Union II while training daily with the first team, providing him the “iron-sharpens-iron” environment needed to prepare for the jump to MLS.
For Atlanta United, this move clarifies the 2026 defensive rotation. With the signing of Tomás Jacob and the return of Enea Mihaj, the club is leaning on experience for the immediate future while keeping Moore in a “developmental incubator.”
Atlanta United 2026 Roster (as of Jan. 21)
| Position | Players |
| Goalkeepers | Jayden Hibbert, Lucas Hoyos |
| Defenders | Amador, Berrocal, Chong Qui, Edwards, Hernández, Gregersen, Jacob, Mihaj, Moore (Loan Out) |
| Midfielders | Almirón, Alzate, Fortune, Lobjanidze, Miranchuk, Muyumba, Pita, Reilly, Sanchez, Torres |
| Forwards | Brennan, Gordon (Loan Out), Latte Lath, Thiaré, Togashi |
Next Steps for Kaiden Moore
Moore is currently expected to join the Union’s preseason camp immediately. As a member of the U.S. U-18 Youth National Team, his performances in Philly will be closely monitored by both club and country scouts. His most recent international success came in May 2025, where he helped the U.S. win the UEFA Friendship Cup.7
Do you think loaning Moore is the right move for his development, or should Atlanta have kept him for depth?
Share your thoughts in the comments below or tag us on Twitter @AtlantaSoccerNews with your take on the 5-Stripes’ youth strategy!
Author: Quique Lopez
Quique Lopez doesn’t just cover soccer—he deconstructs it with the precision of a veteran and the wit of a storyteller. A former player who sees the pitch as both a tactical chessboard and a cultural stage, Quique balances sharp critiques with a genuine love for the game’s soul. He’s as quick to call out the ego of a superstar as he is to find the hidden beauty in a local derby.