Buttler and Mott led England to the 2022 T20 World Cup title in Australia however endured a disappointing 50-over World Cup in India final 12 months, successful solely three of their 9 matches.
They have been then thrashed by eventual champions India within the semi-finals of the T20 World Cup within the Caribbean in June.
England have been crushed 2-1 by West Indies within the one-day worldwide sequence, with defeat within the decider their twelfth in 18 ODIs.
Buttler has been out injured for 4 months however mentioned that absence made him “decided” to steer England’s newest white-ball reset.
“I simply need to be current and assist develop the following period of white-ball cricket and simply actually, actually take pleasure in this a part of my cricket,” he added.
“If you get an damage like that, it makes you realise how desperately you need to get again.”
McCullum mentioned a part of his function is to cheer up Buttler, who he mentioned had been “depressing” at occasions throughout England’s current limited-overs troubles.
“It’s clearly one thing I must work on,” mentioned Buttler.
“I’m actually enthusiastic about him taking on. You’ll be able to see the impact he is had on the Take a look at workforce and the entire narrative round English cricket. He was at all times somebody I would have beloved to play in a workforce with and now there’s an incredible alternative to work with him as a coach.”
Buttler will probably be a specialist batter for the T20 sequence, with Phil Salt remaining as wicketkeeper, whereas Marcus Trescothick continues as interim head coach.
Buttler mentioned he made the choice to surrender the gloves with McCullum, who did the identical throughout his profession to give attention to his function as New Zealand captain.
“When he moved to be near the bowler, he discovered it extremely useful and a terrific place to captain from,” mentioned Buttler.
“I am open to one thing if it may be good for me, good for the workforce. I am fairly completely satisfied fielding. There are pluses and minuses to each.”
West Indies have introduced a 15-man squad for the primary two T20s, with seamer Matthew Forde changing Alzarri Joseph, who’s serving a two-match suspension for leaving the sector after arguing with Shai Hope through the third ODI.
