Two strategies for introducing long chain branching (LCB) to polypropylene homopolymer (PP) were evaluated in terms of the product's molecular weight and branching distribution, and in terms of melt-state shear and extensional rheological properties. Single step processes involving radical-mediated addition of PP to triallyl phosphate were found to generate bimodal products with highly differentiated chain populations, while a two-step sequence involving PP addition to vinyltriethoxysilane followed by moisture-curing generates more uniform architectures. As a result, the sequential approach induces high increase in low-frequency shear viscosity and extensional strain hardening, while staying below the polyolefin's gel point. The composition and molecular weight distribution transformations that underlie sequential LCB techniques will be commented and discussed.