During Presidents' Day, from 8:30 a.m. to 2:15 p.m., visitors can browse over 85 vendor tables and find a place to buy, sell, or trade sports cards. Autograph opportunities (for a fee) are available from Red Sox 2018 World Series champ Brock Holt from 11:30 a.m. to 12:30 p.m. Autographs are also available for a fee from  hockey Hall of Famer and Stanley Cup champ Teemu Selanne., click here.