SPOILER:
Kessler controlled the first 2 rounds, easily, measuring Perdomo. By the 3rd he picked it up a bit and came the first KD. Was only a matter of time for the walking target and the outclassed Perdomo TKO'd in the 4th. They called it a KO. Maybe so.
Not much of a match for the fans unless you simply wanted to see a one-sided romp.