Gary Carter, a freelance rugby reporter who works for The Sun, was found with head injuries outside Bethnal Green station at 01:00 GMT on 6 November.
The Met Police said they had been called to an altercation between two men. Mr Carter, 36, is in a critical condition in hospital.
James Flanagan 35, of Marsden Street, has been charged with grievous bodily harm.
Mr Carter's wife, Gemma Carter, tweeted "Pray for my husband #rflfamily" referencing his role within the rugby league community.
She also thanked well-wishers for their "amazing support during this very difficult time" and added "[I'm] praying @GaryCarter_1979 will pull through".
A 22-year-old man was also arrested in connection with the incident for affray towards attending paramedics. He has been bailed.
A sports journalist is in a critical condition after an attack in London.