Leon Flach

Leon Maximilian Flach (born February 28, 2001) is an American professional soccer player who plays as a midfielder or left-back for Polish club Jagiellonia Białystok.^[3][4][5]

Leon Flach

Flach in 2025 with Jagiellonia Białystok
Personal information
Full name	Leon Maximilian Flach[1]
Date of birth	(2001-02-28) February 28, 2001 (age 24)
Place of birth	Humble, Texas, United States
Height	5 ft 10 in (1.78 m)[2]
Position(s)	Midfielder, left-back
Team information
Current team	Jagiellonia Białystok
Number	31
Youth career
2006–2008	Sereetzer SV
2008–2016	VfB Lübeck
2016–2020	FC St. Pauli
Senior career*
Years	Team	Apps	(Gls)
2020–2021	FC St. Pauli	9	(1)
2020	FC St. Pauli II	3	(1)
2021–2024	Philadelphia Union	116	(2)
2025–	Jagiellonia Białystok	14	(0)
International career
2019	Germany U18	2	(0)
2020	United States U20	2	(0)
* Club domestic league appearances and goals as of 18 July 2025

Club career

FC St. Pauli

Flach made his professional debut for FC St. Pauli in the 2. Bundesliga on September 27, 2020, coming on as a substitute in the 85th minute for Jannes Wieckhoff against 1. FC Heidenheim, which finished as a 4–2 home win.^[6]

Flach scored his first professional goal for FC St. Pauli on January 3, 2021, scoring in the 82nd minute against Greuther Fürth in a 2–1 loss.^[7]

Philadelphia Union

In March 2021, Flach signed a two-year contract with Philadelphia Union competing in Major League Soccer.^[8] Flach's debut with the Union was starting in the club's first CONCACAF Champions League match, defeating Deportivo Saprissa 1–0.^[9] Flach scored his first goal for the Union on October 3 against reigning MLS Champions, Columbus Crew in a 3–0 win.^[10] His performances throughout the 2021 season made Flach a regular starter in the Union midfield and was recognized as being named among the MLS's 22 under 22.^[11]

Jagiellonia Białystok

On January 15, 2025, free agent Flach joined Polish defending champions and UEFA Conference League participants Jagiellonia Białystok on a two-and-a-half-year deal, with an option for another year.^[12]

Personal life

Flach was born in Texas to German parents while his father was working in Houston before returning to Hamburg as a child. He has represented Germany and the United States at youth level. Flach is a fan of the Houston Texans.^[3]

Career statistics

As of match played May 24, 2025

Appearances and goals by club, season and competition

Club	Season	League			National cup[a]		Continental		Other		Total
		Division	Apps	Goals	Apps	Goals	Apps	Goals	Apps	Goals	Apps	Goals
FC St. Pauli II	2020–21	Regionalliga Nord	3	1	—		—		—		3	1
FC St. Pauli	2020–21	2. Bundesliga	9	1	—		—		—		9	1
Philadelphia Union	2021	MLS	34	1	—		6[b]	0	3[c]	0	43	1
	2022	MLS	34	0	1	0	—		3[c]	1	38	1
	2023	MLS	25	1	1	0	4[b]	0	5[d]	0	35	1
	2024	MLS	23	0	0	0	—		6[e]	0	29	0
	Total		116	2	2	0	10	0	17	1	145	3
Jagiellonia Białystok	2024–25	Ekstraklasa	13	0	1	0	5[f]	0	1[g]	0	20	0
Career total			141	4	3	0	15	0	18	1	177	5

1. Includes U.S. Open Cup, Polish Cup
2. Appearances in CONCACAF Champions League
3. Appearances in MLS Cup Playoffs
4. Three appearances in Leagues Cup, two appearances in MLS Cup Playoffs
5. Appearances in Leagues Cup
6. Appearance in UEFA Conference League
7. Appearance in Polish Super Cup

Honours

Philadelphia Union

• MLS Cup runner-up: 2022^[13]

Jagiellonia Białystok

• Polish Super Cup: 2024^[14]