Possible Clues:

• Longtime name in baseball broadcasting
• Harry who led Wrigley crowds in 'Take Me Out to the Ball Game'
• Harry who led Wrigley crowds in "Take Me Out to the Ball Game"
• Hall-of-Fame sportscaster Harry who regularly led the Wrigley Field crowd in singing 'Take Me Out to the Ball Game'
• Hall of Fame announcer Harry parodied by Will Ferrell
• Chip, Skip or Harry of broadcasting
• Harry in the American Sportscasters Association Hall of Fame
• Sportscaster with the autobiography 'Holy Cow!'
• Hall-of-Fame announcer Harry
• Legendary announcer Harry