We're nearing the 100-day mark before the start of college football and at this point of the offseason, flying under the radar is a phrase most coaches covet exiting spring practice prior to a mini-break break.

While it's not necessarily a negative if you're one of the nation's hunted teams, playing the opposite role is easier on staffs and players as they gear up to attack the season. Roster flipping and coaching turnover can inject positive momentum and sense optimism for programs who aren't picked to be in the national title conversation, which is where many of these teams come in.

What constitutes a sleeper for the 2019 season? For this exercise, we've chosen a group we expect to be outside the preseason Top 15 in August, many unranked and not considered among the elites (at least not perceived that way heading into openers). For reference, we've also included where we expect each of these teams to be ranked in the AP preseason Top 25.

Here's a look at 10 teams — one from each Power 5 division along with the inclusion of the Big 12's free-for-all format — garnering the underrated label before the start of next season. We'll revisit this bit in November and see how it all shakes out: