Very unproven. But anyone who also has an unproven chin going against him is getting put to sleep. Serious power, Adonis has. Remember seeing him KO Dion Savage on the Mayweather/Ortiz undercard. You could hear his shots so much louder than anyone else's that night in the arena (granted, he only landed 3 or 4 of them before Savage was down and out).
I haven't actually seen the fight against Boone, but apparently it was a rookie mistake combined with an early stoppage... From Wiki : On April 17, 2010, in his first fight in the United States, which also was his first time fighting for promoter Lou DiBella, he suffered his first defeat being stopped in the second round by Darnell Boone. Boone had been knocked down on the canvas twice in the first round, however, in the second round, Stevenson rushed to Boone without maintaining his defense and he got caught by a solid right sending him on the canvas for the first time in his career. Stevenson managed to get back on his feet inside the count of 10, however, the referee ended the fight even if Stevenson seemed ready to continue the bout.
And wasnt Boone the guy who put Ward on his arse too? So being KD'd by him isnt the end of the world.
