Thirty-one individuals who played professional baseball at the major league level before 1900 lack identified given names. All 31 played between 1872 and 1892; 17 played in the National Association, which folded in 1875. Identification of players remains difficult due to a lack of biographical information. A Brooklyn, New York, directory, for instance, lists more than 30 men who could be the professional player "Stoddard". Philadelphia Athletics manager Bill Sharsig signed three of the 31, "local players" McBride, Stafford and Sweigert, for Philadelphia's last game of the season against the Syracuse Stars on October 12, 1890. McBride, Philadelphia's center fielder, and Stafford, the team's right fielder, both failed to reach base, but left fielder Sweigert reached base on a walk and stole a base. Society for American Baseball Research writer Bill Carle "doubt[s] we will ever be able to identify them". David Nemec has commented on this phenomenon with both major league and minor league players, noting, for example, that a McGuire is probably the player with an unknown first name whose appearances came closest to the twentieth century.