I have a 14mm and 11mm sessile polyp found on colonoscopy. haven't received pathology report yet. what are the odds that it could be cancerous or precancerous?

It depends.: The risk depends on whether you have a family history of colon cancer. Generally, 10 to 30 percent of colon cancers arise from sessile adenomas, according to this excellent article: https://www.aafp.org/afp/2000/0315/p1759.html Hope yours is not cancerous or even pre-cancerous! Eat a high fiber, low fat diet. Remember high animal fat diets have more cancer risk than diets high in vegetable fat