As far I'm concerned.
Ronaldo was the only player who played in any of those team and scoring wasn't really hard for him
So RONALDO it is.
Soccerfreestyleandtricks.com
Ronaldo
barcelona, inter milan,ac milan,real madrid
Luis Figo
Ronaldo (Inter Milan, A.C Milan, Real Madrid, Barcelona, Real Madrid, P.S.V Eindhoven) Edgar Davids (Ajax Amsterdam, A.C Milan, Juventus, Barcelona, Inter Milan)
Ronaldo Delima has played for P.S.V Eindhoven, Barcelona, Inter Milan, Real Madrid, A.C. Milan. ,
Ronaldo Luís Nazário de Lima
Eto
The Brazilian striker Ronaldo Lima is the player who played for both Milan teams . He first played for Inter Milan after leaving Barcelona , and then joined A.C.Milan after he played for Real Madrid.
Ronaldo (PSV, Barcelona, Inter, Real, AC Milan) Davids (Ajax, AC Milan, Juventus, Barcelona, Inter)
Alan Shearer
I only know about Ronaldo (the Brazilian), who played for PSV, Barcelona, Inter, Real Madrid and Milan.
Real Madrid employ the only best footballers from all over the world, and they pay well even.
Real Madrid. AC Milan. Manchester united. Barcelona. Arsenal. Juventus. Liverpool. Inter Milan.