After 42 years, Fred Roggin to sign off from KNBC Channel 4
They were rookies together. Fernando Valenzuela and Fred Roggin each made his Los Angeles debut in September of 1980.Valenzuela threw his last pitch for the Dodgers 33 years ago. After a career of covering the likes of Valenzuela, Kobe Bryant, Wayne Gretzky and Al Davis for Channel 4, Roggin is hanging up his microphone. His last day as a sports anchor there is Thursday.It’s his choice, he says. He’ll still appear on his AM 570 radio show. He’ll explore opportunities in television production, whether hosting shows or…