The 2019 regular season is in the books, and several rookie coaches made their first impressions on the college football world. From Ryan Day at Ohio State to Manny Diaz at Miami and everyone in between, coaches laid the groundwork for the future of their respective programs throughout the fall.

Some were successful ... and others were not. Some led their teams to bowl games ... and others fell just short. But the process is still ongoing, potentially with better days on the horizon for some. Others could be a flash in the pan at their programs with the bottom set to fall out by the time Year 2 rolls around next summer.

Let's grade the first-year coaches from 2019 based solely on their performance this season.