Prepare the Chicken: Chop the grilled chicken thighs into bite-sized pieces and season with salt, pepper, and BBQ rub.

Cook the Bacon: In a skillet over medium heat, cook the bacon until crispy. Remove and let drain on paper towels, then crumble into pieces.

Assemble the Filling: In a large bowl, combine the chopped chicken, crumbled bacon, sliced tomatoes, shredded lettuce, and ranch dressing. Toss gently to combine.

Prepare the Sub Rolls: Slice the toasted sub rolls open, but not all the way through, creating a pocket for the filling.

Fill the Sub Rolls: Generously fill each sub roll with the chicken and bacon mixture, then top with shredded mozzarella cheese.

Serve: Enjoy your delicious Chopped Chicken Bacon Ranch Subs immediately, or wrap them up for a tasty meal on the go!