Maynard, an up-and-coming Surrey batsman tipped to become an England star, was hit by a tube train at Wimbledon Park station at around 5am on Monday 18 June.
He had been stopped by police at 4.15am after driving his car erratically and ran off, only to be tragically killed.
The inquest jury subsequently returned a verdict of accidental death.
The 23-year-old died from multiple injuries, Westminster Coroners' Court was told, but it was not possible to establish whether electrocution or the impact of the train caused the death, according to forensic pathologist Dr Simon Poole.
Poole told the court that the player had several illegal drugs in his system, among them cocaine and ecstasy, with tests on the player's hair indicating that he had used drugs regularly for the previous three months.
The player's blood alcohol level was recorded at 310mg/100ml, four times the drink-drive limit, while traces of cocaine were also found in his urine.
Poole explained how the cocktail of drugs and alcohol would "cause a high degree of intoxication" and have a "detrimental effect" on decision making.
Cricket was sent in to mourning last summer by the tragic death of the player, with tributes flowing in from everybody in the game about a rising star with an incredibly bright future.
A letter from Surrey physio Alex Tyson read out at the inquest described the player as having "all the looks and talent on earth without an arrogant bone in his body", while a statement from his family called him a "sports mad" young man who was popular with team-mates.
Mr Maynard's girlfriend, Carly Baker, told the court he had called her at about 03:30.
"He sounded very down and depressed on the phone," she said. "For me to say 'what's wrong' is quite unusual. It was like he needed me. He said: 'You're the only thing that makes me happy', and he said it three times."
Maynard, a powerful middle-order batsman who could also bowl off-breaks, made his senior debut as an 18-year-old in 2007.
Following his father’s departure as Glamorgan director of cricket in November 2010, he opted to join Surrey.
He helped the Lions secure the Clydesdale Bank 40 title as well as County Championship promotion, averaging over 40 in the three domestic competitions.
In winter 2011 he was part of the England Performance Programme and toured Bangladesh with England Lions.