Buttler has not played a competitive match since defending champions England lost their T20 World Cup semi-final against India in Guyana in June.
The 34-year-old suffered a setback and has been forced to miss both the three-match T20I series, which concludes on Sunday, and the five-game ODI contest with Australia.
The 25-year-old Brook has only 15 ODI caps and said during last year’s chastening World Cup campaign in India, where England endured a woeful defence of their 50-over title, he was still “trying to figure out the format”.
But England already regard the Yorkshire batsman as a future long-term leader and his appointment means they will have deployed a new skipper in all three international formats this season.
Ollie Pope took over as Test captain from Ben Stokes when the all-rounder’s hamstring injury meant he missed the three-match series against Sri Lanka, with Phil Salt leading the T20I side after Buttler was sidelined.
Josh Hull, the 20-year-old left-arm fast bowler who made his Test debut in the Sri Lanka series finale at The Oval earlier this month, had been due to be a member of the 50-over squad but has suffered a quad injury and will rest ahead of next month’s trip to Pakistan.
Liam Livingstone, initially dropped from the ODI squad, has been recalled after two notable performances in a T20I campaign against Australia level at 1-1 ahead of Sunday’s decider in Manchester.
The ODI series against Australia, the reigning 50-over world champions, begins at Nottingham’s Trent Bridge ground on Thursday.
© Agence France-Presse
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