"I had seen Mike in the lead-up to the Mayweather-Pacquiao fight [earlier this month] on the Vegas Strip and he was charging people US$250 to take a picture with him," said Parker. "I was blown away he took the time to spend a few minutes with me."
Tyson's journey from a tough childhood in New York's Brooklyn neighbourhood to heavyweight champion was well documented in his biography Undisputed Truth, released in 2013. In it he also detailed his addiction problems and the way he squandered millions of dollars - which is probably why he has taken to charging fans for pictures.
Tyson has followed up Undisputed Truth with a boxing documentary - which also features Evander Holyfield and Bernard Hopkins - called Champs, which Parker saw at the weekend. Parker will return to New Zealand from his Las Vegas base on Saturday.