Adonis Stevenson stopped Polish challenger Andrzej Fonfara at 28 seconds of the second round on Saturday night to successfully defend the World Boxing Council light heavyweight title.
The Montreal fighter pounded Fonfara with left-hand blows before Fonfara's corner waved to referee Michael Griffin to stop the beating.
Stevenson (29-1) defended the title he won in 2013 and beat Fonfara (29-5) for the second time, this time much more easily than his win by unanimous decision in 2014 that saw both fighters hit the canvas.
This time, the southpaw Stevenson came out firing lefts from the start. He put Fonfara down midway through the first and ended the round raining blows on the right-hander.
The onslaught continued to start the second with at least five clean lefts landing before the bout was stopped.