The Brief Cumulus Media praised Greg Papa as a defining voice in Bay Area sports radio whose decades of work helped shape KNBR. The company said it could not comment on the specifics of Papa’s departure but expressed deep respect and gratitude for his contributions. Longtime Bay Area sports broadcaster and San Francisco 49ers radio play-by-play announcer Greg Papa has been laid off from KNBR. Cumulus Media, which owns KNBR, issued a statement on Aug. 7 acknowledging Papa's departure and praising his decades of work at the station. What they're saying:"For decades, Greg Papa has been one of the defining voices of Bay Area sports radio," Cumulus Media said in an online statement.