| Club | League | Years |
|---|---|---|
| Bayer Leverkusen | Bundesliga | 1990 |
| Benfica | Primeira Liga | 1990–1994 |
| Arsenal | Premier League | 1994–1995 |
| Fiorentina | Serie A | 1995–1998 |
| Valencia | La Liga | 1998–1999 |
| Sunderland | Premier League | 1999–2003 |
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 Stefan Schwarz an answer for?
In Who Played Both, if two of these clubs meet, Stefan Schwarz is one of the right answers.
- Arsenal – Sunderland 26 players
- Benfica – Valencia 24 players
- Fiorentina – Valencia 15 players
- Benfica – Fiorentina 13 players
- Arsenal – Valencia 9 players
- Arsenal – Fiorentina 7 players
- Arsenal – Benfica 6 players
- Arsenal – Bayer Leverkusen 5 players
- Bayer Leverkusen – Benfica 4 players
- Bayer Leverkusen – Sunderland 4 players
- Sunderland – Valencia 4 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.