To that point: Liston didn't have a birth certificate. He said he was born in 1932, which would have made him 32 when he fought Ali the first time. Others have cited statements that gave him a birth year of 1928, which would have made him 36 for that fight. That was mighty old for a heavyweight in that era, boxing a 22 year old like Ali.
Ever see a photo of Liston's hands? Gigantic.