IRVING, Texas – Jake Paul is three days out from what will likely be the most-watched bout of his 12-fight boxing career. Looking at him, however, you might not be able to tell. The 27-year-old YouTuber-turned-boxer was all smiles and charisma Tuesday during an open workout at Toyota Music Factory ahead of Friday’s boxing match vs. Mike Tyson.

Boxing legends and experts tip their winner for historic fight - The former world heavyweight champion takes on the YouTuber-turned-boxer

Nostalgia is a powerful thing and it has a lot of people riding with former undisputed heavyweight champion "Iron" Mike from a betting perspective. The more skeptical fortune tellers side with Paul's 31-year youth edge and relative boxing success. Whatever side you fall on, there's a morbid curiosity about the whole thing.