Deletion of Giants yankees rivalry

Comment: I know it is kind of like saying |other stuff exists, but a pairing which has provided several World Series and co-habited the same city for a long time must be at least as notable as supposed rivalries between teams who have only played each other since interleague play came about (eg Freeway Series). It would be |recentist to argue against this article's concept
Stance: keep
Cited policy: Wikipedia:Arguments to avoid in deletion discussions (WP:OTHERSTUFFEXISTS||WP:RECENTISM)