When we were n the military and lived in Asia any meat we got was or had been frozen and I cooked roasts from frozen all the time. The result was always a tender, flavorable roast. I don't remember how long I roasted it per pound or if I wrapped it but it always turned out well. I haven't had to roast a frozen one for years but wouldnt hesitate to do it again if I forgot to take the roast out of the freezer.