Having had a muck-around with OBBLM, the games vs Spare will go as follows.
I'll set up a dummy coach and team in the league.
Coach needing a SPARE game can play any other coach (I'll let them arrange who and when).
Fun bit: they then roll a D8 to see who's team they're facing - yes, that means they could end up facing their own team in a mirror match!
1. TheyreDeadDave
2. Tom
3. Mark
4. Darkson
5. Moodygit
6. Lunchmoney
7. WaddyWoos
8. HazelNutSoup.
Don't roll for it now though.