Damn, boy...you are right up my alley.
My beloved Mother-in-law was born and raised in GDL and the whole family lives there now. Mi esposa esta Chilanga. Mi madre's team is Atlas and always has been, Padre and the brothers are America. I know who feeds me when I'm there so MY TEAM IS ATLAS. Barcelona is my team after visiting the Camp Nou a few years ago and I take pride that a Méxicano holds a place on that roster. It was the 50th Anniversary and the experience was HAUNTING. I REALLY wish I'd known that Atlas was in PDX this weekend. I might have skipped the next to the last game to get there and enjoy it. Must pay more attention to the Timbers website.

One other thing you didn't mention: Timbers U23s play Vancouver on Sunday, 2:00 pm, at PGE Park. And, in my opinion, if you have to choose only one Timbers game to attend on Sunday, the U23s in the afternoon or the first team vs. Atlas in the evening, the U23 match is definitely the one to choose.