So I attempted to create matchups for Tier 2 Bowl Games using the CFP Top 25 teams not in a 12 Team CFP, unranked G5 champs, and top at-large (if needed). This is my opinion on the matchups and bowls selected. I would suspect that the CFP committee or separate committe involving the bowls would select the matchups, but for this exercise, I used the Bowl Tie-Ins Matchups as a starting point and slots unfilled became at-large for the remaining teams in the Tier 2 Pool. I tried matching up those matchups based on location and rankings. I'll let you all decide if this would be useful or not.

2017 Tier 2 Bowl Games:
Alamo (Big 12 vs. PAC-12)
#15 TCU (10-3) vs. #13 Stanford (9-4)
Citrus (SEC #1 vs. Big Ten #1)
#16 Michigan St. (9-3) vs. #17 LSU (9-3)
Cheez-It (ACC vs. Big 12)
#14 Notre Dame (9-3) vs. #19 Oklahoma St. (9-3)
Holiday (PAC-12 vs. ACC)
#18 Washington St. (9-3) vs. #22 Virginia Tech (9-3)
Music City (Big Ten vs. SEC)
#21 Northwestern (9-3) vs. #20 Memphis (10-2)
Outback (SEC vs. Big Ten)
#23 Mississippi St. (8-4) vs. Florida Atlantic (10-3)
Duke’s Mayo (ACC vs. SEC)
#24 NC State (8-4) vs. Troy (10-2)
Texas (Big 12 vs. SEC)
#25 Boise St. (10-3) vs. Toledo (11-2)

2018 Tier 2 Bowl Games:
Alamo (Big 12 vs. PAC-12)
#13 Washington St. (10-2) vs. #15 Texas (9-4)
Citrus (SEC #1 vs. Big Ten #1)
#14 Kentucky (9-3) vs. #22 Northwestern (8-5)
Cheez-It (ACC vs. Big 12)
#16 West Virginia (8-3) vs. #20 Syracuse (9-3)
Holiday (PAC-12 vs. ACC #3)
#17 Utah (9-4) vs. #21 Fresno St. (11-2)
Outback (SEC vs. Big Ten)
#18 Mississippi St. (8-4) vs. UAB (10-3)
Music City (Big Ten vs. SEC)
#23 Missouri (8-4) vs. Northern Illinois (8-5)
Texas (Big 12 vs. SEC)
#24 Iowa St. (8-4) vs. #19 Texas A&M (8-4)
Duke’s Mayo (ACC vs. SEC)
#25 Boise St. (11-2) vs. Appalachian St. (10-2)

2019 Tier 2 Bowl Games:
Outback (SEC vs. Big Ten)
#18 Minnesota (10-2) vs. #12 Auburn (9-3)
Citrus (SEC #1 vs. Big Ten #1)
#14 Michigan (9-3) vs. #13 Alabama (10-2)
Cheez-It (ACC vs. Big 12)
#15 Notre Dame (10-2) vs. #21 Cincinnati (10-3)
Music City (Big Ten vs. SEC)
#16 Iowa (9-3) vs. #20 Appalachian St. (12-1)
Holiday (PAC-12 vs. ACC)
#19 Boise St. (12-1) vs. #22 USC (8-4)
Texas (Big 12 #3 vs. SEC)
#23 Navy (10-2) vs. Florida Atlantic (10-3)
Duke’s Mayo (ACC vs. SEC)
#24 Virginia (9-4) vs. Miami (OH) (8-5)
Alamo (Big 12 vs. PAC-12)
SMU (10-2) vs. #25 Oklahoma St. (8-4)

2020 Tier 2 Bowl Games*:
Cheez-It (ACC vs. Big 12)
#13 North Carolina (8-3) vs. #21 Oklahoma St. (7-3)
Citrus (SEC #1 vs. Big Ten #1)
#14 Northwestern (6–1) vs. #16 BYU (10-1)
Outback (SEC vs. Big Ten)
#15 Iowa (6-2) vs. #19 Louisiana (9-1)
Holiday (PAC-12 vs. ACC)
#18 Miami (FL) (8-2) vs. #17 USC (5-1)
Alamo (Big 12 vs. PAC-12)
#25 Oregon (4-2) vs. #20 Texas (6-3)
Texas (Big 12 vs. SEC)
#22 San Jose St. (7-0) vs. Army (9-2)
Duke’s Mayo (ACC vs. SEC)
#23 NC State (8-3) vs. UAB (6-3)
Music City (Big Ten vs. SEC)
#24 Tulsa (6-2) vs. Ball State (6-1)
* = Assuming no opt outs