He spent the majority of his professional career as a baseball writer and columnist at The Baltimore Sun from 1987 to 2000. Simultaneously, he was a contributor to Sports Illustrated from 1990 to 2000, serving as one of 12 national writers providing weekly notes during baseball season. Rosenthal was named Maryland Sportswriter of the Year five times while at the Sun. He also spent five years as senior baseball writer at The Sporting News, writing a weekly column for the magazine, as well as breaking news and writing features for its web site.
In addition, Rosenthal is a frequent contributor to Fox Sports Radio, and had a 14-year run as a radio personality in Baltimore on WJFK-AM and WBAL-AM. In 2009, Rosenthal joined MLB Network's on-air roster as a baseball insider.
Rosenthal also has authored or contributed to three books. "Chicken Soup for the Baseball Fan's Soul", was released in 2001, while "Best of the Best-35 Major League Superstars", which was produced in partnership with and licensed by MLB Properties, Inc., was published in 1998. His third book, "Dean Smith: A Tribute", was published in 2001. One claim to fame: His laptop once got smashed by a Cal Ripken foul ball.
