A vehicle door glass blocker assembly including a blocking bracket securable to a vehicle door frame panel, and a blocking edge integrally formed with the blocking bracket, being substantially normal to a vertical edge of a vehicle window, and being capable of at least partially shattering the vehicle window when the window impacts the blocking edge during a vehicle crash event. A blocking protrusion may be coupled to the blocking bracket, be longitudinally disposable between the vehicle window and a vehicle door latch mechanism, and be capable of at least partially preventing transverse displacement of the vehicle window. A support bracket may be secured to the blocking bracket, and a glass run extrusion may be secured to the support bracket, be adapted to accept a vertical edge of the vehicle window, and be capable of reducing vibrations in the vehicle window.