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Nick Wass/Associated Press

The Baltimore Ravens are in the critical part of the offseason as they evaluate both free agents and NFL draft hopefuls alike.

Free agency begins in early March, while the draft isn't until late April. However, a key step in the draft process came this week in the form of the NFL Scouting Combine.

Here, 300 of the best draft prospects were in Indianapolis to go through a series of body measurements, health checkups and on-field drills that were based on their specific positions.

While this doesn't typically make or break a prospect's chances of being drafted, it can affect his stock and help solidify positioning in the upcoming draft.

For this article, we're taking a look at the four players who boosted their stock this week to the point that Baltimore should have these guys on its first-round big board for this April's draft.

These four prospects had an outstanding week of on-field workouts in addition to recording great measurables that will make them even harder to pass up on if they're still on the board when the Ravens are picking in the first round.

Note: Unless otherwise noted, all measurements and drill results are courtesy of NFL.com.