1.FSV Mainz 05Con Jeonbuk Hyundai Motors, Lee Jae-sung ganó la K League en 2014, 2015, 2017 y 2018, además de la Liga de Campeones de la AFC en 2016. A nivel individual, fue incluido en el equipo ideal de la K League en varias temporadas y ha sido un pilar en la selección surcoreana.
Lee Jae-sung es un centrocampista ofensivo surcoreano que ha desarrollado la mayor parte de su carrera en Europa, destacando en el 1. FSV Mainz 05 de la Bundesliga. Anteriormente, brilló en el Jeonbuk Hyundai Motors de su país natal, donde ganó múltiples títulos de la K League. Es conocido por su visión de juego y capacidad para asistir, siendo un habitual en la selección de Corea del Sur.
Lee Jae-sung es un mediapunta creativo con excelente técnica y visión para filtrar pases entre líneas. Su principal fortaleza es la inteligencia táctica y la capacidad para encontrar espacios en defensas cerradas, aunque su falta de velocidad y físico limitan su impacto en transiciones rápidas. Se desempeña mejor como enganche, conectando el mediocampo con el ataque.
| Season | Comp | Apps | G | A | YC | RC | Min |
|---|---|---|---|---|---|---|---|
| 25/26 | UEFA Conference League | 7 | 1 | 2 | 0 | 0 | 336 |
| 25/26 | Bundesliga | 28 | 4 | 2 | 4 | 0 | 2201 |
| 25/26 | International Friendlies | 7 | 0 | 1 | 1 | 0 | 368 |
| 25/26 | UEFA Conference League Qualifying | 2 | 1 | 0 | 0 | 0 | 172 |
| 25/26 | DFB-Pokal | 2 | 0 | 0 | 0 | 0 | 75 |
| 24/25 | Bundesliga | 33 | 7 | 8 | 4 | 0 | 2666 |
| 24/25 | DFB-Pokal | 1 | 0 | 1 | 0 | 0 | 111 |
| 23/24 | World Cup qualification Asia | 16 | 5 | 3 | 1 | 0 | 1062 |
| 23/24 | Bundesliga | 29 | 6 | 4 | 6 | 0 | 2128 |
| 23/24 | International Friendlies | 5 | 1 | 1 | 0 | 0 | 360 |
| 23/24 | DFB-Pokal | 2 | 0 | 0 | 0 | 0 | 139 |
| 22/23 | Bundesliga | 34 | 7 | 4 | 2 | 0 | 1904 |
| 22/23 | International Friendlies | 5 | 0 | 1 | 0 | 0 | 312 |
| 22/23 | DFB-Pokal | 2 | 0 | 0 | 0 | 0 | 110 |
| 21/22 | Bundesliga | 27 | 4 | 3 | 3 | 0 | 1449 |
| 21/22 | International Friendlies | 0 | 0 | 0 | 0 | 0 | 0 |
| 21/22 | DFB-Pokal | 3 | 0 | 0 | 1 | 0 | 178 |
| 2025 | East Asian Football Championship | 0 | 0 | 0 | 0 | 0 | 0 |
| 2023 | AFC Asian Cup | 6 | 0 | 0 | 1 | 0 | 437 |
| 2022 | World Cup | 3 | 0 | 0 | 0 | 0 | 215 |
| 2022 | East Asian Football Championship | 0 | 0 | 0 | 0 | 0 | 0 |
| 2019 | East Asian Football Championship | 0 | 0 | 0 | 0 | 0 | 0 |
| 2019 | AFC Asian Cup | 1 | 0 | 0 | 0 | 0 | 86 |
| 2018 | K League 1 | 17 | 4 | 4 | 0 | 0 | 954 |
| 2018 | Korea Cup | 0 | 0 | 0 | 0 | 0 | 0 |
| 2018 | World Cup | 3 | 0 | 1 | 1 | 0 | 270 |
| 2018 | AFC Champions League (- 2024) | 8 | 1 | 2 | 0 | 0 | 663 |
| 2017 | K League 1 Final A | 5 | 2 | 4 | 1 | 0 | 450 |
| 2017 | K League 1 | 23 | 6 | 6 | 1 | 0 | 1887 |
| 2017 | Korea Cup | 0 | 0 | 0 | 0 | 0 | 0 |
| 2017 | East Asian Football Championship | 3 | 1 | 2 | 0 | 0 | 252 |
| 2016 | K League 1 Final A | 4 | 1 | 3 | 0 | 0 | 304 |
| 2016 | K League 1 | 28 | 2 | 9 | 6 | 0 | 2475 |
| 2016 | Korea Cup | 1 | 0 | 0 | 0 | 0 | 90 |
| 2016 | AFC Champions League (- 2024) | 13 | 1 | 6 | 1 | 0 | 1138 |
| 2015 | K League 1 Final A | 5 | 2 | 0 | 0 | 0 | 450 |
| 2015 | K League 1 | 29 | 5 | 4 | 2 | 0 | 2465 |
| 2015 | Korea Cup | 1 | 0 | 0 | 0 | 0 | 22 |
| 2015 | East Asian Football Championship | 3 | 0 | 1 | 0 | 0 | 193 |
| 2015 | AFC Champions League (- 2024) | 9 | 2 | 2 | 0 | 0 | 810 |
| 2014 | K League 1 Final A | 5 | 0 | 1 | 0 | 0 | 450 |
| 2014 | K League 1 | 21 | 4 | 0 | 1 | 0 | 1876 |
| 2014 | Korea Cup | 3 | 0 | 1 | 0 | 0 | 152 |
| 2014 | Asian Games | 2 | 0 | 0 | 0 | 0 | 203 |
| 2014 | AFC Champions League (- 2024) | 7 | 1 | 1 | 1 | 0 | 570 |
| 2013 | Korea Cup | 1 | 0 | 0 | 0 | 0 | 90 |
| 2012 | Korea Cup | 1 | 0 | 0 | 1 | 0 | 90 |
| 2011 | Korea Cup | 1 | 0 | 0 | 0 | 0 | 38 |
| 20/21 | 2. Bundesliga | 33 | 5 | 6 | 1 | 0 | 2804 |
| 20/21 | Bundesliga Playoffs | 2 | 1 | 1 | 0 | 0 | 180 |
| 20/21 | International Friendlies | 2 | 0 | 0 | 1 | 0 | 126 |
| 20/21 | DFB-Pokal | 5 | 2 | 0 | 0 | 0 | 451 |
| 19/20 | World Cup qualification Asia | 15 | 1 | 4 | 0 | 0 | 1195 |
| 19/20 | 2. Bundesliga | 31 | 9 | 8 | 2 | 0 | 2733 |
| 19/20 | International Friendlies | 1 | 0 | 0 | 0 | 0 | 76 |
| 19/20 | DFB-Pokal | 2 | 1 | 1 | 0 | 0 | 189 |
| 18/19 | 2. Bundesliga | 29 | 5 | 9 | 2 | 0 | 2317 |
| 18/19 | International Friendlies | 6 | 2 | 0 | 0 | 0 | 339 |
| 18/19 | DFB-Pokal | 2 | 0 | 1 | 0 | 0 | 96 |
| 17/18 | International Friendlies | 10 | 1 | 0 | 0 | 0 | 762 |
| 16/17 | World Cup qualification Asia | 5 | 0 | 0 | 0 | 0 | 264 |
| 16/17 | FIFA Club World Cup | 2 | 0 | 1 | 0 | 0 | 180 |
| 16/17 | International Friendlies | 1 | 0 | 0 | 0 | 0 | 26 |
| 15/16 | International Friendlies | 2 | 0 | 1 | 0 | 0 | 97 |
| 14/15 | World Cup qualification Asia | 7 | 3 | 2 | 0 | 0 | 408 |
| 14/15 | International Friendlies | 4 | 1 | 0 | 0 | 0 | 264 |
| 07/08 | International Friendlies | 1 | 0 | 2 | 0 | 0 | 80 |