If you are just starting out or rolling with a budget team you can get some good guys who are Legendary rookie cards. They're 80 ovr and sometimes 85 ovr and very cheap because there were so many in packs. For FB's I've been using rookie Franco Harris for the longest time. He's one of the cheapest FB's. Can't block very well but is good for coming out of the back field or as a receiving tight end. I also dont use many formations with an FB in the backfield so his lack of blocking isnt much of a problem for me