Dorticos went down early in the first, while Fields went down twice in the second and finally put through the ropes in the fourth.
Dorticos improves to 17-0-0 with all 17 wins coming by way of knock outs (having only boxed a total of 36 rounds), and now holds three titles.
Here are some images of that contest.
Click on the images for a larger view
First knock down of Fields, through the ropes.
Dorticos first sets up the left with a right to the head. This left is the KO shot.
Special thanks to King Sports Worldwide.
As always, all images are copyright Peter Politanoff / RedStarImage and cannot be reproduced without explicit consent.