London - Surrey's Tom Maynard, one of England's most promising batsmen, has died at the age of 23, the county said on Monday.
Maynard was killed after being struck by a London Underground train in the early hours of Monday morning.
In a statement, Surrey said Maynard, the son of former Glamorgan and England batsman Matthew Maynard, was "an incredibly talented young batsman".
Matthew Maynard currently coaches the Titans franchise in South Africa.
British Transport Police (BTP) confirmed a 23-year-old man, named locally as Maynard, had been hit by a train early on Monday morning.
A BTP spokesperson said: "BTP officers were called to the line near Wimbledon Park London Underground station on Monday, June 18 after a man was struck by a District line train.
"The incident was reported to BTP at 05:03 SA time and was also attended by Metropolitan Police officers.
"London Ambulance Service medics attended but the man, believed to be 23-years-old, was pronounced dead at the scene.
"The incident is currently being treated as non-suspicious.
"A file will be prepared for the coroner."
Tom Maynard began his career with Glamorgan before joining Surrey at the start of last season and also played for the England Lions, the national 'A' team.
He left after his father was forced out as coach of the Welsh county in 2010, saying his position had become "untenable".
Surrey's statement said Maynard was "an incredibly talented young batsman", who had "impressed in all forms of the game".
Maynard scored his maiden first-class hundred at Cardiff, Glamorgan's headquarters, last year and helped Surrey win the county 40-over tournament.
A first-class record of 2 384 runs in 48 matches at 32.65 with four hundreds may seem modest but it was the way he compiled that tally which led him to be identified as an England prospect.
Surrey's statement added: "His future potential was unlimited, with experts both inside and outside the club predicting he would soon follow in the footsteps of his father Matthew by graduating to full England honours.
Surrey chairperson Richard Thompson said: "There is a profound sense of loss at the passing of Tom. To lose anybody at such a young age is an utterly senseless tragedy."
England and Wales Cricket Board chairperson Giles Clarke said: "This is a very sad day... Tom was a player of enormous potential who had already represented England Lions and had an exciting future ahead of him.
"Our hearts go out to the Maynard family for their tragic loss and we send them and all Tom's many friends and colleagues within the game our deepest sympathies.
Surrey's Twenty20 game against Hampshire at The Oval on Wednesday has been postponed as a mark of respect.
Meanwhile England, who trained at The Oval - Surrey's headquarters - ahead of Tuesday's second one-day international against the West Indies at the London ground, cancelled a media conference.
This was the third time a transport tragedy had claimed the life of a young Surrey cricketer in the last 15 years.
In 2002 Ben Hollioake, already an England all-rounder, died aged 24 in a car accident in Perth, Western Australia.
His passing came after Graham Kersey, a 25-year-old wicketkeeper, died on New Year's Day 1997 after he too was involved in a car crash in Australia.
From Australia, Adam Hollioake, Ben's brother and a former Surrey captain, tweeted: "Wot is going on at Surrey? R we cursed or something? Graham Kersey, my bro, now this.... Treasure every moment with loved ones x."