What is East Coast Bias? Here’s one explanation from Urban Dictionary:
East Coast bias The sports media’s tendency to cover, and show more attention to, sporting events and teams that are from the East Coast of America.
Maybe this is a ‘thing’ because ESPN headquarters are in Connecticut? Maybe because sports from the east coast starts earliest in the USA? Sporting events on the East Coast come on TV much earlier and end before people go to bed on the West Coast. Maybe most sports commentators hired from the South to the East coast, are indoors more often watching TV, while the West Coast Media has so much more to do because of the sunshine?