Angel and devil on the shoulders is a familiar setup, but the idea is to have contrasting ideas. Here we have synonymous phrases. I didn’t get the joke and had scheduled it as a CIDU for a later date.
But, here in the US, it’s the weekend where college football conference championship games are played, and the 4 teams who will play for the national championship are picked. Last night at dinner, while our joint grandson opened presents for his 10th birthday, his other grandfather had the Florida State – Louisville game on his phone at the table — and it was only a scoreless first quarter. This made me realize that lots of people are committing all their angels, good and bad, to this sport.
Comics I Don't Understand 
I suppose it just shows they’re both fans of the local sports team?
On a side note the angel and the devil were also in strong agreement in that one scene in Animal House.
I agree with chipchristian @1 that all three figures are wearing the same helmet, but I think only the angel is really taking the player’s side (and perhaps hinting at a certain amount of lenience for potential rough behavior), whereas the devil would be willing to support anything that leads to gratuitous violence.