| Club | League | Years |
|---|---|---|
| Manchester United | Premier League | 1936–1953 |
| Manchester City | Premier League | 1941–1942 |
| Cardiff City | Premier League | 1941–1942 |
| Everton | Premier League | 1942–1943 |
| Middlesbrough | Premier League | 1942–1943 |
| Liverpool | Premier League | — |
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 Johnny Carey an answer for?
In Who Played Both, if two of these clubs meet, Johnny Carey is one of the right answers.
- Manchester City – Manchester United 59 players
- Everton – Manchester City 54 players
- Everton – Manchester United 46 players
- Everton – Liverpool 46 players
- Cardiff City – Middlesbrough 43 players
- Liverpool – Manchester City 37 players
- Manchester City – Middlesbrough 28 players
- Manchester United – Middlesbrough 25 players
- Everton – Middlesbrough 25 players
- Cardiff City – Manchester City 24 players
- Liverpool – Middlesbrough 24 players
- Cardiff City – Manchester United 22 players
- Cardiff City – Liverpool 22 players
- Liverpool – Manchester United 19 players
- Cardiff City – Everton 15 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.