Spread the rub all over the outside of the rinsed roast. Gently place the rubbed pork roast in a large resealable freezer bag. Take out the excess air, seal, and freeze.
Place the seasoned roast into the crock pot. Cook on low for 6-8 hours. Once cooked, drain the extra fat and water from the crock pot.
Use a set of tongs or two forks to pull the roast apart. After it's shredded, add 1/2 of the full bottle of BBQ sauce and mix through. Add more if you want it saucier.