Vin Scully doesn't care about your jinxes. Really, no one does. If you believe in broadcasters jinxing ballplayers, you probably send out a lot of emails with "FW: FW: RE: FW: RE: FW:" in the subject header.
Scully was not shy about calling Clayton Kershaw's no-hitter on Wednesday night, using words like "no-hitter," "no-hits" and "Clayton Kershaw is throwing a no-hitter." If you want to know why Scully does it, you can read it from the man himself. From the Los Angeles Times in 1960:
"It's insulting the listeners to make them think they're silly and superstitious enough to believe my telling them that a no-hitter is going will affect the game."
Indeed. Though people didn't even seem to mind back then, either.
Since Scully made his stand on the matter three seasons ago, he's only received three postcards admonishing him for breaking the "news" of a no-hitter to listeners.
There is no such thing as a broadcaster's jinx. Scully, as always, is there to inform you and make your baseball viewing experience better.
You can jinx things, though. All kinds of things. You should probably shut up during games because that stuff is real.