Baker has taken two five-wicket hauls in six County Championship games this season and left Somerset at the end of last summer.
However, his breakout event was The Hundred. In addition to his hat-trick against Spirit and Fire, he also performed a hat-trick against Brook’s Northern Superchargers.
After being called into the England white-ball team, Baker revealed to BBC Sport that he drinks “bone broth” every day to help prevent further problems after being previously injured in his career.
He’s previously appeared in The Hundred, Brook continued.
“He can swing it both ways with exceptional death skills, so it’s awesome to have him on the team and great to have him open up tomorrow.”
Brook’s second appearance in a white-ball series since taking over as head coach earlier this year.
Under Brook earlier in the summer, England won all six of their matches against West Indies, including three ODIs and three T20s.
England are just getting started on the preparations for the 2027 50-over World Cup, after three disappointing international competitions in a row. The Ashes are set to be the focus this winter.
In February of next year, India and Sri Lanka will host a T20 World Cup.
“We’re trying to create a climate where we’re working toward something, like Eoin Morgan Morgs did when he took over years ago,” Brook said.
“South Africa’s cricket is a little different from that of West Indies.
We must evaluate situations more quickly when working with a team like this. They have a more traditional side.
Eight days prior to the Proteas’ 2-1 victory in an ODI series against Australia, they have arrived in the UK. At the Champions Trophy in March, they defeated England by seven wickets, which Jos Buttler’s final capitulation.
Kagiso Rabada, who has a workload of his own, is included in their squad, but he won’t play the first ODI.
Only the T20 squad includes Donovan Ferreira and David Miller, who both had a positive impact with The Hundred.