He tied for ninth/tenth at New York 1911 (Marshall won), tied for fifth/sixth at New York 1914 (Edward Lasker won), tied for seventh/eighth at New York 1915 (José Raúl Capablanca, tied for 10–11th at New York 1916 (Capablanca won), took fourth at New York 1921 (Quadrangular), and took 11th at Lake Hopatcong 1923 (the ninth American Chess Congress, Marshall and Abraham Kupchik won).
Albert Einstein | Royal Albert Hall | Victoria and Albert Museum | Albert Camus | Prince Albert | Albert Park | Albert Speer | Albert Schweitzer | Albert, Prince Consort | Albert Campion | Albert | Albert Park, Victoria | Albert II, Prince of Monaco | Albert Bierstadt | Albert Finney | Johann Albert Fabricius | Albert R. Broccoli | Albert Lee | Eddie Albert | Albert Einstein College of Medicine | Albert Bandura | Albert Watson (photographer) | Albert Watson | Albert King | Albert II of Belgium | Albert Brooks | Albert I of Belgium | Albert Gleizes | Mount Albert | Albert, Somme |
Showalter won U.S. Championship matches against Max Judd (1891/92, +7-4=3), Albert Hodges (1894, +7-6=4), S. Lipschütz (1895, +7-4=3), Emil Kemény (1896, +7-4=4), and John Finan Barry (1896, +7-2=4).