Rear bumper towing

I dont have a trailer hitch on my Blazer, but would pulling a jetski from the spot on the back bumber for the ball be aight?

The back bumper ball hitch is considered to be a class 1. Which if memory serves me correct will do upto 250 lbs tounge Weight and 2500 lbs gross towing weight. As long as the JetSki is below that weight you should be good.