Right on the heels of publicly admitting that he has a serious alcohol addiction, former heavyweight boxing champion, Mike Tyson has made a few other astounding claims about his life. The Sydney Morning Herald leaked some juicy details from Tyson's new tell-all memoir, and they just may change the way fans view his volatile years in boxing. The 47 year old legend describes in sad detail his love of alcohol and drugs, dating all the way back to infancy, stating that he was given booze when he was a baby, and tried cocaine for the first time when he was just 11 years old.

Of particular interest are the revelations that he fought high on drugs for several of his high profile fights and went so far as using a fake penis filled with someone else's urine to pass his drug tests.

"I was a full-blown cokehead," Tyson says in Undisputed Truth.

He listed several instances where he was taking drugs right before fights, including bouts with Lou Savarese, Danny Williams and Andrew Golota. He also claims that he was high on cocaine before the infamous press conference with rival, Lennox Lewis that ended with Tyson biting Lewis' leg.

Among other shockers in the book, Tyson gives insight to "Herculean" mood swings, insatiable womanizing, and the mismanagement and ultimate squandering of his considerable fortune. There are stories of paying off a woman who had been bitten by his pet tiger, to the tune of $250,000.

"Iron Mike" still stands by his claims of innocence regarding the rape of Desiree Washington, and says that his punishment for the crime he was convicted of was unjust. He does, however, go on to reveal that his incarceration was a comfortable one, and that he often dined on lobster, and even had an affair with his drug counselor.

The Undisputed Truth by Mike Tyson will be published in Britain by HarperCollins on November 21.