The official Seattle Mariners hot dog, Fletcher's Seattle Mariner Beef Franks is sure to be a home run hit! Made with no fillers — just juicy beef — they're gluten-free and bursting flavor. Fletcher's special blend of spices has been thrilling Mariners fans since the 1990s but you don't have to be a sports fan to enjoy this Northwest favorite fresh off the grill, stovetop or oven.