Historically, the Cleveland Browns are famous for whiffing on their number one draft picks, but the seventh round hasn’t been that kind to them either. There may be an analytics-based reason for the seventh round difficulty, however.
It’s not necessarily just bad scouting. An argument is outlined below that undrafted free agents may be better than the seventh round in the draft for finding good players. Basically, the reason is that the team can audition several players in camp if they are undrafted free agents or veterans who have been cut. In the draft, the decision is made only on the basis of pre-draft scouting.