Add to Favorite Sellers. Pete Alonso New York Mets Autographed Black Nike Authentic Jersey – Fanatics Authentic Certified. Pete Alonso New York Mets Autographed Black Nike Authentic Jersey. Due to quantity levels, we do at times list a stock image of the product. This is done to standardize and expedite the listing process and only applies for merchandise that is comparably identical. Major League Baseball Authentication, Fanatics Authentic.