The function of "for" in "He plays for Real Madrid."?

[Kawkabwaheed]

Greetings:
In the sentence, "He plays for Real Madrid.", what is the function of "for"? Is it a preposition in this position? What is exactly is the grammatical function of "for" in this sentence? Any information is greatly appreciated.

[Mister Micawber]

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Yes, it is a preposition meaning 'on behalf of, in assignment to'.
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Native English teacher at Mister Micawber's