Preheat oven to 400 degrees F. Cook ground beef, bacon, and onions in large skillet on medium-high heat until ground beef is evenly browned, stirring occasionally. Drain; return meat mixture to skillet. Add velveeta; cook until melted, stirring frequently. Cool 10 minutes.
Unroll pizza dough onto baking sheet sprayed with cooking spray. Press into 15x8-inch retangle. Top evenly with meat mixture. Roll up dough, starting at one of the long sides. Rearrange, if necessary, so roll is seam-side down on baking sheet.
Bake 20 to 25 minutes or until golden brown. Cut diagonally into six slices to serve.