I haven't seen any tip'o'the'hat or tribute-y material referring to / aimed at that one California baseball team published in any adventure or sourcebook, ever, so we should conclude WotC is trying to make the team disappear via silence?
Not so. At least angels get representation in the game. Other Upper-Plane celestials, on the other hand, completely get the shaft—where are the gaurdinals, (celestial) eladrin, and archons?
/feigned outrage
It's fairly obvious they have a huge bias towards that team from Texas. I mean, their mascot is a class for crying out loud! How much more preferential can you get?
I think they hate Tennessee's professional football team. I mean, their mascot was in the original Monster Manual, but is nowhere to found now--I mean as an actual entry, not just a title attached to another creature.