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Julio Cortez/Associated Press

Day 1 of the 2015 NFL combine's on-field drills is in the books and the Detroit Lions—like every other team—got their first up-close look at potential prospects for the upcoming draft.

No, things aren't any clearer for your mock draft. In fact, things might have become murkier because a few unknowns jumped into the fold that weren't prominent names a couple of days ago. But that makes draft season all the more fun.

As we tour the standouts that improved their stock, take note that this is only encompassing the first day of drills, so you'll only find offensive linemen and tight ends here. Now click through so we can wade our way through the numbers to find six guys who took a step toward making their NFL dream a reality.