Here’s the excerpt from Harry Caray’s Wikipedia page:
“Following the 1969 season, the Cardinals declined to renew Caray's contract after he had called their games for 25 seasons, his longest tenure with any sports team. The team stated that the action had been taken on the recommendation of Anheuser-Busch's marketing department, but declined to offer specifics. At a news conference afterward, during which he drank conspicuously from a can of Schlitz(then a major competitor to Anheuser-Busch), Caray dismissed that claim, saying no one was better at selling beer than he had been. Instead, he suggested, he had been the victim of rumors that he'd had an affair with Gussie Busch's daughter-in-law.”