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Richard Mackson-USA TODAY Sports

National signing day brings the promise of a brighter future, but only a select group in each recruiting class actually make a significant difference on the field right away.

We're taking a second look at 2015 class and highlighting which programs recruited the most high-level immediate-impact prospects.

The SEC dominated the initial rankings, placing 10 teams in the top 22. With that extraordinary volume, the conference was bound to have several programs appear on the re-grade.

As with any recruiting class, a handful of signees haven't seen the field or are no longer on the roster. For that reason, we're not ranking based on average production. Rather, the emphasis is on players who have contributed in a notable fashion or are headed that way.

Each Power 5 conference is represented in the rankings. Auburn and Ohio State narrowly missed the cut.

Note: All prospect information and rankings via Scout.