This article lists the performances of each of the 21 national teams which have made at least one appearance in the World Baseball Classic. The 2006 and 2009 tournaments, each had the same 16–team field, chosen by invitation. Beginning with the 2013 tournament, the four last-place teams from the previous tournament's first round each contested a qualifying round against three additional teams. The outcome of this process has been that 14 of the original 16 teams have continued to appear in every tournament. In 2013, Canada and Chinese Taipei re-qualified while Panama and South Africa were respectively replaced by Brazil and Spain. In 2017, Australia and Mexico re-qualified while Brazil and Spain were respectively replaced by Colombia and Israel.
