If we had a 12 team playoff last year it would've went something like this.
The higher team plays the lowest seeded team in each round regardless of brackets
College Football Playoff
1. Clemson
2. Bama
3. Sparty
4. OU
5. Iowa
6. Stanford
7. Ohio State
8. Notre Dame
9. Florida State
10. UNC
11. TCU
12. Ole Miss
1st round
5. Iowa (21) vs 12. Ole Miss (28)
6. Stanford (30) vs 11. TCU (13)
7. Ohio State (35) vs 10 UNC (24)
8. Notre Dame (21) vs 9 FSU (20)
Second Round
1. Clemson (38) vs 12. Miss (20)
2. Alabama (31) vs 8 Notre Dame (17)
3. Michigan State (20) vs 7 Ohio State (31)
4. OU (27) vs 6 Stanford (24)
Semi Finals
1. Clemson (35) vs 7 Ohio State (31)
2. Alabama (31) vs 4 OU (21)
Championship
Bama Vs Clemson
Same score as last year