Odd Team Out

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Here are 16 well-known footballers of yore. But which of the three clubs mentioned did they not play for?

Q1. Diego Maradona.
Q2. Ian Rush.
Q3. Alan Shearer.
Q4. Martin Keown.
Q5. Petr Cech.
Q6. Eric Cantona.
Q7. Dion Dublin.
Q8. Roy Keane.
Q9. Louis Saha.
Q10. William Gallas.
Q11. Graeme Souness.
Q12. Stan Collymore.
Q13. Paul Merson.