From Barry Hugman's History of World Championship Boxing
2012-05-05 Chris John w pts 12 Shoji Kimura, Marina Bay Sands Hotel, Singapore - WBA. Referee: Ferlin Marsh. Scorecards: 118-109, 117-110, 119-108.
Due to face Nicholas Walters, and having been inactive for a year, Celestino Caballero vacated his WBA ‘second tier’ title rather than take the fight.