Jos Buttler argues that the decision to relieve Brendon McCullum of his Test‑coaching duties could actually improve England's chances at the upcoming Cricket World Cup, because the former New Zealand captain can now devote all of his attention to the white‑ball game. McCullum was stripped of his red‑ball responsibilities in July, with former All‑rounder Stephen Fleming eventually stepping into the role, while McCullum retained control of the limited‑overs programme that wrapped up the English summer with an impressive record of eleven victories and just two losses. Those wins included series triumphs over India and Sri Lanka, a boost for England’s one‑day reputation after a dip in form since they lifted the title in 2019. Buttler, who led England during the ill‑fated defence of the 2023 World Cup, believes that the split‑coaching arrangement has freed McCullum to concentrate exclusively on the upcoming tournament in southern Africa.

"He now has a single focus – the white ball," Buttler said on his For the Love of Cricket podcast. "He could have done both, but when you split your time between Tests and ODIs you have to juggle a lot more. Now he can channel all his energy into the limited‑overs format, especially the ODI World Cup that is just over a year away." The former New Zealand skipper appears to be "all in" on the question of how to win the trophy with the England side.

Buttler noted that McCullum can now see the World Cup as a concrete target rather than a distant ambition. Four months ago his remit covered everything from Test strategies to T20 tactics; today his brief is narrowed to a single, clearly defined goal – to fine‑tune England’s ODI game and devise a winning plan for the 2027 tournament. "He has more time and more focus on that," Buttler explained.

"ODI cricket for England has been inconsistent for a couple of years, so there is real room for growth, and this summer’s results have given us a promising start." The shift in coaching responsibilities also aligns with the broader trend of specialist coaches in modern cricket, where teams often separate their Test and limited‑overs staff to maximise expertise. By handing the Test side to Fleming, England can benefit from his deep experience in the longer format while allowing McCullum to apply his aggressive, attacking mindset to the 50‑over game. This division of labour could lead to more targeted preparation, clearer tactical plans, and a stronger sense of purpose among the players.

However, England face a significant challenge of their own: Buttler is currently sidelined with a hamstring injury. The veteran wicket‑keeper‑batsman has already been ruled out of the forthcoming tri‑series in Pakistan and remains a doubt for the November tour of Australia. If he misses the series, England could be without their most seasoned ODI player for up to eight matches, a substantial blow to the team’s preparation ahead of the World Cup.

"I’ve had a scan and I’m waiting to see the specialist. Then we’ll know what the next steps are," Buttler said. "The unknown is often the toughest part. Every cricketer wants a physiotherapist or doctor to give a clear date for return, but they can’t guarantee that yet." Despite Buttler’s injury woes, the overall sentiment among England’s camp is optimistic.

The recent ODI series victories over two strong Asian sides have restored confidence and highlighted the depth of talent in the squad. Young players such as Harry Brook and Rehan Ahmed have shown the ability to perform under pressure, while seasoned campaigners like Ben Stokes and Jos Buttler himself (when fit) provide the experience needed to navigate high‑stakes matches. McCullum’s philosophy, built around aggressive batting, innovative field placements, and a fearless approach to the game, is expected to permeate the England set‑up throughout the next year. With the Test side now under Fleming’s guidance, McCullum can experiment with batting orders, develop power‑hitting strategies, and fine‑tune the bowlers’ death‑over skills without the distraction of longer‑format commitments.

This singular focus could be the catalyst England needs to transform from a team that has struggled to replicate its 2019 glory into a genuine contender for the 2027 title. In summary, Buttler believes that the coaching restructure – McCullum’s removal from Test duties and Fleming’s appointment – gives England a clearer, more concentrated pathway to World Cup success.

While injuries to key players like Buttler pose short‑term setbacks, the long‑term benefits of a dedicated white‑ball coach, combined with recent ODI triumphs, suggest that England are positioning themselves to be serious challengers when the tournament kicks off in southern Africa next winter.