Murray, who has long been touted as a future leader and makes his Kangaroos debut on Saturday, said there were others more qualified for the honour.
“I don’t think I’m ready for the captaincy yet. I’m 21,” Murray said at a fans event on Wednesday ahead of the Test triple-header in Auckland.
“I guess age is irrelevant so it’s probably not an excuse.
“But for me, I don’t think I’ve had the experience that I need and I don’t think I’ve learned what it takes to take over that role, especially filling shoes of Sam.”
Five-eighth Cody Walker has filled the role on different occasions last year, however there are concerns about his long-term future in Redfern.
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About to enter the final year of his current deal, the 29-year-old late-bloomer has been linked with a move elsewhere to obtain a big-money contract.