Lewis was an 8 to 5 favorite and Tyson was the dog when they

fought.

Floyd Mayeather. Jr. was never a dog.

Mike Tyson was rarely underdog. Liston was never, Foreman rarely was, Lewis never was.

maybe lennox lewis , i'm sure about the razor ruddock fight 50-50

british fighter terry marsh the undeafeated IBF 140 champ never faced anyone his wasn't expected to beat.

Sonny Liston, he still was I believe a fairly heavy favorite in his rematch with Clay/Ali