The College Football Playoff selection committee will reveal the first-ever 12-team field on Sunday afternoon.

Some of the decisions are straightforward for the committee, like placing the Oregon Ducks at No. 1.

Oregon will be joined by the Georgia Bulldogs in the top two, but after that, the seeding becomes more of a mystery.

The four teams that will host first-round playoff games are likely known, but they could be seeded in a handful of different ways.

The biggest question of them all is if the SMU Mustangs get in over the Alabama Crimson Tide. The final at-large spot is down to those two programs.

CFB Playoff Prediction

No. 1 Oregon (Big Ten champion)

No. 2 Georgia (SEC champion)

No. 3 Boise State (best G5 champion)

No. 4 Arizona State (Big 12 champion)

No. 12 SMU vs. No. 5 Notre Dame

No. 11 Clemson vs. No. 6 Texas

No. 10 Indiana vs. No. 7 Ohio State

No. 9 Tennessee vs. No. 8 Penn State

Oregon and Georgia do not have to worry about anything during Sunday's selection show.

The Ducks are the top seed as the lone undefeated team in the country, while the SEC champion Bulldogs slot in at No. 2 behind the Big Ten champion.

The assumption is that the Boise State Broncos and Arizona State Sun Devils will pick up the other first-round byes because both the top Group of Five champion and Big 12 winner were ahead of the ACC champion Clemson Tigers in the latest rankings.

Clemson should either be the No. 11 seed in front of SMU, or the No. 12 seed behind Alabama.

SMU's playoff argument is that it only lost to ranked teams and landed a berth in its conference championship.

Alabama played the tougher schedule in the SEC, but it also has losses to a pair of unranked teams on its resume.

The selection committee had no problem throwing two-loss Miami out of the ACC behind Alabama in last week's rankings, so there is concern it would do the same with SMU.

Three of the four first-round hosting spots will go to the Big Ten and SEC.

The Ohio State Buckeyes, Penn State Nittany Lions and Texas Longhorns should be in the No. 5-8 seed mix with the Notre Dame Fighting Irish.

Notre Dame is the only one-loss team of the group, Penn State and Texas are conference championship runner-ups and Ohio State owns a head-to-head win over Penn State.

The committee has to figure out which criteria they will use to sort the four teams.

Two of the hosts will play the Tennessee Volunteers and Indiana Hoosiers, who barring a massive drop by Texas or Penn State, will be the Nos. 9 and 10 seeds.