Top Ten Undefeated Boxers Prev2 of 11NextUse ← → (arrow) keys to browse Number 10. Callum Smith, 27-0-0 (KO 19) – Super Middleweight Prev2 of 11NextUse ← → (arrow) keys to browse Facebook Comments Share this:Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Like this:Like Loading...