William Parker was carrying a kitchen knife near the arena on May 18 this year.
The 50-year-old pleaded guilty to possessing a knife in a public place.
Parker, of Lighthouse View in Greenwich, appeared at Bromley Magistrates’ Court on Tuesday, October 14, for sentencing.
He was given a 13-week sentence which was suspended for one year, meaning he will not see the inside of a prison cell unless he breaches the terms of his sentence.
Parker will be required to complete up to 25 days of rehabilitation activity and was fined £200.
