Hal Bagwell was for years credited with the longest winning streak in boxing history.
The Ring Record Book listed Bagwell as number 1 on their all time list of most consecutive wins. From 1938-1948, Bagwell was credited with posting a 180-0 winning streak. However, in recent years there seems to be some doubts as to this winning run.
Even the Guiness Book of World Records listed Bagwell for years as the record holder for most consecutive wins.
BR currently have him listed at 90-5-6. (going 60-0-3 over that 10-year period - a third of what's claimed)