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Mark J. Rebilas-USA TODAY Sports

The 2015 NFL draft is just around the corner. What better time than now to grade last year's class?

Granted, one season is hardly enough time to properly assess a batch of rookies, but we can still rank each team's haul based on what we saw after one year.

Some rookies didn't see the field due to injury, which can hardly be counted against their teams. It still left a hole when it comes to evaluation, however. Plenty of rookies showed out, while others showed nothing.

Subjectively speaking, let's give the top three rounds more weight, since those picks expected to make impacts as rookies. If a team found a mid- or late-round gem, it'll serve as a bonus.

The more rookies that contributed positively, the better for that team's ranking.