Last night is actually the same thing he had put into his hammy last year if you all remember.
Platelet Rich Plasma (PRP) involves the application of concentrated platelets, which release growth factors to stimulate recovery in non-healing injuries. PRP causes a mass influx of growth factors, such as platelet-derived growth factor, transforming growth factor and others, which exert their effects of fibroblasts causing proliferation and thereby accelerating the regeneration of injured tissues. Bottom line here is that PRP helps the healing process.
Hopefully this will actually work, as it looks promising:http://www.prolotherapy.org/prolotherapy/platelet-rich-plasma-prp-injection-technique (Don't worry, nothing nasty on this website, unless your sensitive to blood).
Brandon Roy also said he told Dr. Don Roberts that he would like to be back sometime after all-star break. Although there is no time table set as of right now.