It is actually better to be signed as an UDFA than to be picked in the 7th round. If you are picked in the 7th, you might get 3 reps to prove yourself in camp, whereas an UDFA usually gets a workout to themselves, to prove their worth. Now they may not like what they see and cut you loose but at least you get a chance to prove yourself. Those 7th rounders need to make a huge splash with their very few reps.