Mario Guerrero has suddenly begun to look a little old. He is no
longer a guy who could be mistaken as a promising youngster. The
dissolving of the faint aura of potential around Mario Guerrer...
This 1977 card signals the passing of the halfway point of both my
childhood and Mario Guerrero’s itinerant career. Early in the
preceding season, Mario Guerrero was traded by the St. Louis Car...