Boss Jock Gary Mack Postcard

This is a promotional postcard for Gary Mack. The back of the postcard reads:

KHJ “Boss Jock” Gary Mack
Could be through the disguise of radio that a bad cat could come out sounding like the greatest. But when the real thing comes along there isn’t any mistaking a really warm person. And nice guys finish first ... Gary Mack proves that every minute he’s on the air!
KHJ Boss Jock Gary Mack Postcard