Professional footballers have to show a number but fans and supporters don't have to. it is completely optional
4
Chelsea
9
10
Tuncay's squad number at Middlesbrough was 17.
Carlos Tevez wheres the number 32 shirt
Ryan Giggs Ryan Gigs does not wear that shirt anymore for Wales - he is retired from international football.
Ashley Young wears the number 11 shirt for England
ronaldo
Johnny ertl
John Terry
11 omg you stupid noob