Up for sale is a vintage baseball mitt by O.K. MFG, Big League Model, with Frank Thomas signature embossed into the leather (Frank Joseph Thomas Sr., June 11, 1929 – January 16, 2023, was an American outfielder and third baseman in Major League Baseball (MLB) who played for seven National League (NL) teams from 1951 to 1966. He was a three-time All-Star)  Item measures approx. 8.5 x 9 inches.  Item has some wear and tear, see pics for details.