‘The Special One’ was far too classy for Gavin, as had been predicted, and won every round on his way to a one-sided victory at the O2 Arena in London.
Gavin was never in the fight from the first bell and was punished each time he attempted to trade with Brook who possesed the superior power by some distance.
A pin-point straight right hand did the damage in the sixth and Brook followed it up with some more hurtful shots on the ropes until referee Steve Gray ended Gavin’s misery.
Brook could now be in the mix with nemesis Amir Khan and American Keith Thurman on the trimmed shortlist to face Floyd Mayweather Jr on September 12.
Just prior to the main event, Anthony Joshua proved his world heavyweight title credentials further by becoming the first man to stop tough American Kevin ‘Kingpin’ Johnson.
The Olympic gold medallist looked on a mission from the word go and began pummelling Johnson as Joshua attempted to do what Vitali Klitschko and Tyson Fury failed to achieve.
Joshua, 25, pinned Johnson against the ropes towards the end of the first round, dropping the 35 year-old before seemingly scoring a second knockdown right on the bell.
The latter wasn’t scored by referee Ian John-Lewis, although Joshua picked up where he left off in the second and forced the official to step in and save Johnson.
With 13 early finishes in his 13 contests, and nobody able to go past three rounds with the big Watford man so far, ‘AJ’ certainly seems to be the real deal on current evidence.