Answer:
The silhouette on the Major League of Baseball (MLB) logo belongs to no particular player as per its original designer Jerry Dior. The logo shows a silhouetted batter poised to swing at a ball, against a red-blue background. It was first unveiled in the fall of 1968 and the horizontal logo appeared on players' uniforms during the 1969 season, accompanied by the words 100th Anniversary.
However, there are rumours that the logo is based on Harmon Killebrew. Killebrew was a former American professional baseball player who himself claimed that it was his silhouette. According to him once he went to the commissioner's office and there was a guy who was making a logo of the MLB which looked like him. He had a photograph of Killebrew in a hitting position and had grease pencils with which he was drawing the logo. When Killebrew asked the person what he was doing, he replied that he was trying his hand on a new Major League Baseball logo.
In fact, Killebrew is the model for the Major League Baseball Players Alumni Association, an organization which Killebrew helped found in 1982.
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