1973 National League Championship Series

The 1973 National League Championship Series was played between the New York Mets and the Cincinnati Reds from October 6 to 10. New York won the series three games to two and advanced to the World Series, where they lost to the Oakland A's in what was the second of three straight world championships for Oakland. The Mets set a record for lowest win percentage by a pennant winner, finishing the regular season with an 82–79 record.

1973 National League Championship Series

The 1973 National League Championship Series was played between the New York Mets and the Cincinnati Reds from October 6 to 10. New York won the series three games to two and advanced to the World Series, where they lost to the Oakland A's in what was the second of three straight world championships for Oakland. The Mets set a record for lowest win percentage by a pennant winner, finishing the regular season with an 82–79 record.