I don’t understand the fictional. Is that what you are projecting at the end of the season, prior to bowls?
I think he is doing a couple things:
First, he is using the model under discussion where the top-6 league Champions and six at-large teams get in. I also *THINK* that the first round byes are reserved for league Champions.
Second, like a lot of NCAA Tournament forecasters do, he is just assuming that the highest ranked team in a league will be the league Champion. Thus, #2 tOSU is the assumed B1G Champion. 
Following that logic and the existing rankings I get the following playoff seeds:
- #1 UGA (presumed SEC Champ)
 - #2 tOSU (presumed B1G Champ)
 - #4 TCU (presumed B12 Champ)
 - #6 Oregon (presumed P12 Champ)
 - #3 Michigan, at large
 - #5 Tennessee, at large
 - #7 LSU, at large 
 - #8 USC, at large 
 - #9 Bama, at large
 - #10 Clemson (presumed ACC Champ)
 - #11 Ole Miss, at large 
 - #17 Tulane (presumed tallest midget)
 
So then the match-ups in the first round are hosted by the #5-8 seeds:
- Tulane at Michigan 
 - Ole Miss at Tennessee 
 - Clemson at LSU
 - Bama at USC
 
However, I thought the model under discussion reseeded after the first round. Maybe that was just wishful thinking on my part because I think it should. 
If it doesn't, it is simple, you get the second round matchups that 
@OrangeAfroMan laid out:
- Tulane/Michigan vs Oregon
 - Ole Miss/Tennessee vs TCU
 - Clemson/LSU vs tOSU
 - Bama/USC vs UGA
 
However, if we reseed then we cannot determine the second round games until we know the first round results. 
Looking at your team's game as an example:
- If Michigan wins they'll be the #3 seed and play the #6 seed.
 - If Tulane upsets Michigan in the Big House they'll be the #8 seed and play UGA.
 
So let's say the winners are the four home teams. (SIDE NOTE FOR 
@jgvol and other SEC fans, the result of the Bama/USC game is irrelevant as far as seeding/match-ups go because they are #8/9 and thus interchangeable so you can just mentally replace "USC" with "Bama" to get the version where Bama wins out in LA) The second round games would be:
- UGA vs USC
 - tOSU vs LSU
 - Michigan vs Oregon
 - TCU vs Tennessee 
 
But note that one upset can change all four games. If Tulane upsets Michigan we get:
- UGA vs Tulane
 - tOSU vs USC
 - TCU vs LSU
 - Tennessee vs Oregon