In truth, this is not a punt in the dark. Coach Charlotte Edwards is not fond of those.
England first discussed having Capsey, who was a wicketkeeper for much of her junior career, as an option during their pre-season camp in South Africa earlier this year.
Amid a dearth of alternatives and after some early-season work, the 22-year-old was listed as the back-up to regular keeper Amy Jones for this summer’s T20 World Cup.
She was never needed but when captain Nat Sciver-Brunt returned from injury for England’s semi-final, the idea of in-form batter Sophia Dunkley keeping her place, Jones missing out and Capsey taking the gloves was on the table before ultimately being dismissed.
“Especially at the beginning of the summer, I was pretty nervous to do it,” Capsey says.
“I went into my shell a little bit and was quite internal. It was awesome to have Sophie Ecclestone and those characters who are outgoing, jokey and keep everything relaxed.
“Everyone has seen me train so much now over the course of the summer it is second nature.”
Like all good keepers, Capsey loves the rough and tumble that comes with the job.
“The amount of times you take blows on the fingers, or one goes down the leg side and you miss it…” she says.
“But those are the bits you enjoy, working to get better and better.”
Capsey was a keeper when she came through the Surrey academy, only putting down her gloves when she started playing for a higher age group short of an off-spinner.
“Who knows if I hadn’t played up whether I would have just kept on keeping, but it is really cool going back to the roots and where I started,” she says.
Her time at Bede’s School in Sussex also coincided with that of former England wicketkeeper Sarah Taylor, who worked there as a sports coach before moving back into the professional game where she now works with England’s men.
It gave Capsey – a 12-year-old spectator in the stands when Taylor and England won the 2017 World Cup at Lord’s – the chance to work with her wicketkeeping hero who is regarded as one of the best keepers the world has seen.
“The way she went about it, did it her way and brought an X Factor to it was really cool,” Capsey says.
“She has been on my shoulder for the last four or five years saying I need to get back to keeping.
“It has been awesome to touch base with her, especially this summer to be able to message her and say ‘I am back’.”
Capsey began ramping up her glovework in training at the start of the summer, fitting drills around her batting, bowling and out-fielding.
She has also had to tweak her sessions in the gym to strengthen her legs and, in particular, her abductors for those squats behind the stumps.
“I have pulled up, touch wood, after all of it so far,” Capsey says. “Come back to me at the end of the week.”
And while it is six years since her last official outing, Capsey did keep behind closed doors in one of England’s warm-ups against India before the T20 World Cup.