This week in San Francisco — while World Series euphoria is still flowing in the streets — baseball’s darker side is being explored. A revealing documentary produced by the local Comcast affiliate — Out: the Glenn Burke Story –premieres Wednesday on both the cable sports channel and at the Castro Theater in San Francisco’s iconic gay neighborhood, the Castro.

Glenn Burke was one of the great high school athletes to come out of the Bay Area in the 1970s. He was a top prospect for the Los Angeles Dodgers, a starter in the 1977 World Series, a player for his hometown Oakland A’s.

And he was openly gay.

The documentary is a stark look at the last taboo in professional male team sports.

But 33 years after Burke led an openly gay lifestyle on the L.A. Dodgers, no active player on a professional men’s sports team has come out.

“I hope that at least we can provoke some discussion,” said the film’s executive producer Ted Griggs, who is also the general manager of Comcast SportsNet Bay Area.