LA/SF these days isn't what it was in the past. If you want to see a real rivalry, then turn back the clock to the 1960's during the age of the Drysdale/Marichal beanball wars. And I would say the rivalry has ebbed even more in recent years with the departure of Barry Bonds.
Future Hall of Shamers:
(1) B.A.L.C.O. Barroids (2) Mark McJuicer (3) Jose Chem-seco (4) Rafael Palmeiroids (5) Ken Chem-initi (6) Jason Gi-andro (7) Ryan Fraud (8) Muscle Melk (9) Woman-Ram (10) Shammy Sosa (11) Roger Clear-mens (12) A-Roid