| Club | League | Years |
|---|---|---|
| Wolfsburg | Bundesliga | 2011–2014 |
| Augsburg | Bundesliga | 2012–2013, 2015–2019 |
| Mainz | Bundesliga | 2014–2015 |
Only the clubs in the game are in the data; spells at other clubs, loans and youth years may be missing.
Which club pairs is Ja-cheol Koo an answer for?
In Who Played Both, if two of these clubs meet, Ja-cheol Koo is one of the right answers.
- Augsburg – Wolfsburg 18 players
- Augsburg – Mainz 17 players
- Mainz – Wolfsburg 14 players
Source: Wikidata (CC0), Wikipedia club articles and player infoboxes (years at each club). Youth spells and appearances that look unplayed are left out; volunteer-kept records can contain gaps or errors.
