Cavan Ayaz Sullivan is an American attacking midfielder who plays for Philadelphia Union in Major League Soccer.
Cavan Sullivan Born in Philadelphia in 2009, he has emerged through one of the strongest youth development systems in the United States.
His progression has been unusually fast. Cavan Sullivan moved from academy football into the professional game while still several years younger than most first-team players.
He is primarily an attacking midfielder. However, his technical profile also allows him to operate in wider midfield areas.
Sullivan is naturally left-footed. His game combines close control, vision and an ability to receive possession between defensive lines.
Development at Philadelphia Union
Cavan Sullivan spent part of his early development with FC Delco before joining the Philadelphia Union Academy in 2020.
His performances quickly established him among the organisation’s leading prospects.
In 2023, he helped Philadelphia reach the Generation adidas Cup U15 final. He scored against Arsenal during the tournament and was selected for the competition’s Best XI.
International recognition followed during the same year.
Cavan Sullivan represented the United States at the Concacaf Boys’ U15 Championship. The United States won the tournament for the first time.
Moreover, Sullivan scored four goals and received the Golden Ball as the tournament’s best player.
He continued progressing during 2024. Philadelphia moved him into its U17 environment, while opportunities with Philadelphia Union II introduced him to professional competition.
Professional Contract and Historic MLS Debut
Philadelphia Union signed Cavan Sullivan to a Homegrown contract on 9 May 2024.
The agreement ran through 2028. At 14, he became the youngest player signed to the first-team roster in Philadelphia Union history.
However, an even larger milestone followed only two months later.
On 17 July 2024, Cavan Sullivan entered Philadelphia’s MLS match against New England Revolution in the 85th minute.
He was **14 years and 293 days old**.
As a result, Sullivan became the youngest player ever to appear in Major League Soccer. He broke the previous record held by Freddy Adu.
MLS also recognised him as the youngest player to debut across the major North American professional team sports leagues.
Philadelphia won the match 5-1. His older brother Quinn Sullivan also scored during the game.
Therefore, the appearance became both a family milestone and an important event in MLS history.
First MLS Start and Continued Development
The 2025 season brought another step forward.
Cavan Sullivan made his first MLS start against Nashville SC on 5 July 2025. At 15 years and 280 days, he became the second-youngest starter in MLS history.
Importantly, Philadelphia continued managing his development through first-team and developmental football rather than relying only on the attention surrounding his age records.
His role expanded further during 2026.
Sullivan recorded his first MLS assist against Charlotte FC on 4 April. That made him the fourth-youngest player to register an assist in league history.
Then, on 13 May, he scored his first MLS goal against Orlando City.
He also produced two assists in that match. Later in May, another assist followed against Inter Miami.
Moreover, Sullivan entered Leagues Cup competition during August 2026. He made his tournament debut against Cruz Azul and registered an assist against Necaxa three days later.
These contributions represent an important change in his development. His story is no longer based only on becoming the youngest debutant.
Instead, Cavan Sullivan is beginning to produce measurable attacking contributions at senior level.
Playing Profile
Cavan Sullivan primarily operates as an attacking midfielder. He can also move into wider midfield positions depending on the system.
His left foot is an important part of his technical profile.
Sullivan is comfortable receiving the ball in congested areas. Moreover, he can turn quickly and move possession into attacking spaces.
Vision was already one of the qualities highlighted by Philadelphia when he signed his professional contract.
His movement without the ball has also developed. For example, first-team experience has required greater involvement in pressing and counterpressing situations.
Physical development remains important because he entered professional football exceptionally young. Nevertheless, regular exposure to MLS opponents provides experience that academy football cannot replicate.
At 16, he already has multiple seasons of senior involvement.
Therefore, his long-term development should be evaluated through progression and responsibility rather than age records alone.
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Player image: Bryan Berlin · Own work / Wikimedia Commons / CC BY-SA 4.0
Career overview
Cavan Sullivan's professional pathway began with Philadelphia Union II before his historic first-team breakthrough. His MLS debut immediately attracted international attention. However, Philadelphia has continued developing him within its established academy-to-first-team structure. ### Philadelphia Union The 2024 season introduced Sullivan to MLS competition. In 2025, he appeared in 11 league matches and earned his first start. Philadelphia's official records also show 214 MLS minutes during that campaign. The 2026 season has produced his first senior attacking milestones. His first assist arrived against Charlotte FC. His first MLS goal followed against Orlando City, alongside two assists in the same match. In addition, Sullivan added further assists against Inter Miami and in Leagues Cup competition. These performances provide a broader career foundation than his debut record alone. ### United States Youth International Cavan Sullivan has represented the United States across youth international football. One of his earliest major achievements came at the 2023 Concacaf U15 Championship. He scored four goals as the United States won the competition and received the Golden Ball. He later progressed into older United States youth teams. His international pathway remains particularly relevant because he is still only 16. Therefore, future senior international milestones should be documented separately as they occur.
Collecting overview
Cavan Sullivan football cards already have unusually strong manufacturer documentation for such a young player. Topps has positioned him prominently within its MLS products. Moreover, several releases explicitly carry rookie terminology. ### 2025 Topps Chrome MLS Rookie Cards One of the strongest references is **2025 Topps Chrome MLS #6 Cavan Sullivan RC**. The checklist identifies him with Philadelphia Union and carries the RC designation. Another base-set variation is **Pitch Prodigies #176 RC**. Topps also includes Sullivan as **Fast Lane FL-1**, another rookie-focused insert. His Chrome catalogue extends considerably further. Documented cards include **Class of Their Own CO-4**, **Helix HX-4** and Chrome Autograph **CA-CS**. There are also multiple autograph formats. For example, Topps lists **RA-CS1** within MLS Renaissance Autographs. In addition, Sullivan appears alongside his brother Quinn in a Chrome Dual Autograph. ### Rookie Debut Patch and Match-Worn Cards One of the most distinctive Cavan Sullivan football cards is his **MLS Rookie Debut Patch Autograph RDPA-CS**. Topps specifically highlights Sullivan among the players included in this premium rookie concept. However, another card has an even closer connection with his record-breaking debut. Topps created **Rookie Arrival Patch Autograph Cards** for Sullivan. These contain material from the match-worn shorts used during his MLS debut at 14. Therefore, these cards directly connect a physical memorabilia component with one of the defining milestones of his early career. ### Topps Inception MLS Cavan Sullivan also has a substantial presence in **2025 Topps Inception MLS**. His base card is **#53**, while **53A** is the corresponding Base Autograph. Other documented cards include **ISS-CS Silver Signings Autograph** and **IGAP-CS Inception Galactic Patch Autograph**. The Galactic Patch Autograph is a 1/1 format. Furthermore, the checklist contains **RAJR-CS Rookie Autograph Jumbo Relic** and **IRJR-CS Rookie Jumbo Relic**. This creates an unusually broad early catalogue across Chrome and Inception.
What collectors should look for
Cavan Sullivan football cards offer several clear collecting strategies. Collectors can focus on traditional rookies, autographs, numbered parallels or cards connected directly to his record-breaking MLS debut. ### Identifying the Rookie Catalogue The 2025 Topps Chrome MLS #6 RC provides a straightforward base rookie reference. Pitch Prodigies #176 and Fast Lane FL-1 expand the rookie-era catalogue. Meanwhile, autograph and patch cards create premium alternatives. Collectors should still distinguish between different terms. A rookie card is not automatically the earliest licensed collectible. Likewise, a Rookie Debut Patch Autograph represents a specific premium category rather than replacing the base rookie. The same distinction applies to Topps Inception. Its #53 card belongs to another product and offers a different design and parallel structure. ### Grading Considerations Chrome cards should be inspected under angled lighting before professional grading. Collectors should look for scratches, print lines and dimples. Centering, edges and corners should also be examined carefully. Thicker memorabilia cards require additional attention. Patch and autograph-relic cards can be more vulnerable to edge and corner wear. Therefore, collectors should not assume that scarcity guarantees a high numerical grade. Serial-numbered parallels should also be identified precisely. For Cavan Sullivan football cards, documenting the product, subset, card number and parallel is particularly important because his early Topps catalogue is already extensive.
Collector questions
Who is Cavan Sullivan?
Cavan Sullivan is an American attacking midfielder born in Philadelphia in 2009. He plays for Philadelphia Union and became the youngest player in MLS history.
What position does Cavan Sullivan play?
Cavan Sullivan primarily plays as an attacking midfielder. He is left-footed and can also operate in wider midfield positions.
How old was Cavan Sullivan when he made his MLS debut?
Cavan Sullivan was 14 years and 293 days old when he debuted against New England Revolution on 17 July 2024.
Does Cavan Sullivan have rookie cards?
Yes. The 2025 Topps Chrome MLS checklist includes Cavan Sullivan #6 RC and Pitch Prodigies #176 RC. He also appears in rookie-focused inserts and autograph sets.
Does Cavan Sullivan have autograph and patch cards?
Yes. His catalogue includes Chrome autographs, Rookie Debut Patch Autographs, Rookie Arrival Patch Autographs and several premium Topps Inception autograph-relic cards.
What should collectors check before grading Cavan Sullivan football cards?
Collectors should inspect centering, corners, edges and surfaces. Patch cards require additional edge inspection, while numbered parallels should be verified before grading.