Mickey Mantle Signed New York Yankees Hat. Auto PSAThe Mick! Offered here is a classic New York Yankees hat signed by Mickey Mantle! Presented in bold silver ink across the front brim, the signature contrasts nicely against the navy cap, offering great display value for any Yankee fan or baseball enthusiast. Mantle signed far fewer hats than he did baseballs or photos, making examples like this notably harder to find. Its a solid addition to any collection, combining the games most recognizable