The 1915 Pittsburgh Pirates season was the 34th season of the Pittsburgh Pirates franchise; the 29th in the National League. The Pirates finished fifth in the league standings with a record of 73âÂÂ81.
|- bgcolor="ccffcc" | 1 || April 14 || @ Reds || 9âÂÂ2 || McQuillan (1âÂÂ0) || Ames || â || 24,000 || 1âÂÂ0 |- bgcolor="ffbbbb" | 2 || April 15 || @ Reds || 1âÂÂ2 || Benton || Harmon (0âÂÂ1) || â || 3,000 || 1âÂÂ1 |- bgcolor="ffbbbb" | 3 || April 16 || @ Reds || 2âÂÂ4 || Douglas || Vance (0âÂÂ1) || Dale || â || 1âÂÂ2 |- bgcolor="ccffcc" | 4 || April 17 || @ Reds || 3âÂÂ2 || Mamaux (1âÂÂ0) || Brown || â || â || 2âÂÂ2 |- bgcolor="ffbbbb" | 5 || April 18 || @ Cubs || 1âÂÂ2 <small>(10)</small> || Vaughn || Cooper (0âÂÂ1) || â || â || 2âÂÂ3 |- bgcolor="ffbbbb" | 6 || April 19 || @ Cubs || 7âÂÂ8 || Pierce || Harmon (0âÂÂ2) || â || â || 2âÂÂ4 |- bgcolor="ccffcc" | 7 || April 20 || @ Cubs || 8âÂÂ6 || Mamaux (2âÂÂ0) || Cheney || McQuillan (1) || 2,000 || 3âÂÂ4 |- bgcolor="ccffcc" | 8 || April 22 || Reds || 8âÂÂ2 || Adams (1âÂÂ0) || Douglas || â || â || 4âÂÂ4 |- bgcolor="ffbbbb" | 9 || April 23 || Reds || 1âÂÂ2 || Dale || Cooper (0âÂÂ2) || Benton || 2,500 || 4âÂÂ5 |- bgcolor="ffffff" | 10 || April 24 || Reds || 1âÂÂ1 <small>(8)</small> || || || â || 10,000 || 4âÂÂ5 |- bgcolor="ffbbbb" | 11 || April 25 || @ Cardinals || 1âÂÂ8 || Doak || Kantlehner (0âÂÂ1) || â || 12,000 || 4âÂÂ6 |- bgcolor="ffbbbb" | 12 || April 26 || @ Cardinals || 0âÂÂ3 || Perdue || Adams (1âÂÂ1) || â || â || 4âÂÂ7 |- bgcolor="ffbbbb" | 13 || April 27 || @ Cardinals || 0âÂÂ3 || Griner || Mamaux (2âÂÂ1) || â || â || 4âÂÂ8 |- bgcolor="ccffcc" | 14 || April 28 || @ Cardinals || 7âÂÂ6 <small>(8)</small> || Harmon (1âÂÂ2) || Sallee || Cooper (1) || â || 5âÂÂ8 |- bgcolor="ffbbbb" | 15 || April 30 || Cubs || 1âÂÂ4 || Zabel || Cooper (0âÂÂ3) || â || â || 5âÂÂ9 |-
|- bgcolor="ffbbbb" | 16 || May 1 || Cubs || 1âÂÂ3 || Standridge || Adams (1âÂÂ2) || â || 2,000 || 5âÂÂ10 |- bgcolor="ffbbbb" | 17 || May 2 || @ Cubs || 1âÂÂ7 <small>(8)</small> || Vaughn || McQuillan (1âÂÂ1) || â || â || 5âÂÂ11 |- bgcolor="ffbbbb" | 18 || May 3 || @ Cubs || 1âÂÂ5 <small>(5)</small> || Pierce || Cooper (0âÂÂ4) || Humphries || â || 5âÂÂ12 |- bgcolor="ccffcc" | 19 || May 4 || Cardinals || 4âÂÂ3 <small>(8)</small> || Harmon (2âÂÂ2) || Perdue || â || â || 6âÂÂ12 |- bgcolor="ccffcc" | 20 || May 6 || Cardinals || 9âÂÂ3 || Adams (2âÂÂ2) || Meadows || â || â || 7âÂÂ12 |- bgcolor="ccffcc" | 21 || May 7 || Cardinals || 6âÂÂ4 || McQuillan (2âÂÂ1) || Doak || â || â || 8âÂÂ12 |- bgcolor="ccffcc" | 22 || May 8 || Cardinals || 3âÂÂ2 || Mamaux (3âÂÂ1) || Robinson || â || â || 9âÂÂ12 |- bgcolor="ccffcc" | 23 || May 9 || @ Reds || 8âÂÂ3 || Harmon (3âÂÂ2) || Douglas || â || â || 10âÂÂ12 |- bgcolor="ccffcc" | 24 || May 10 || Cubs || 10âÂÂ7 || Conzelman (1âÂÂ0) || Zabel || Adams (1) || â || 11âÂÂ12 |- bgcolor="ffbbbb" | 25 || May 11 || @ Phillies || 2âÂÂ4 || Alexander || McQuillan (2âÂÂ2) || â || â || 11âÂÂ13 |- bgcolor="ccffcc" | 26 || May 13 || @ Phillies || 3âÂÂ1 || Harmon (4âÂÂ2) || Demaree || â || â || 12âÂÂ13 |- bgcolor="ffbbbb" | 27 || May 14 || @ Phillies || 3âÂÂ5 || Rixey || Adams (2âÂÂ3) || Mayer || â || 12âÂÂ14 |- bgcolor="ccffcc" | 28 || May 15 || @ Braves || 10âÂÂ6 || Cooper (1âÂÂ4) || Rudolph || McQuillan (2) || â || 13âÂÂ14 |- bgcolor="ffbbbb" | 29 || May 18 || @ Braves || 2âÂÂ3 || James || Harmon (4âÂÂ3) || â || â || 13âÂÂ15 |- bgcolor="ccffcc" | 30 || May 19 || @ Braves || 7âÂÂ0 || Mamaux (4âÂÂ1) || Ragan || â || â || 14âÂÂ15 |- bgcolor="ccffcc" | 31 || May 20 || @ Giants || 6âÂÂ2 || Adams (3âÂÂ3) || Perritt || â || â || 15âÂÂ15 |- bgcolor="ffbbbb" | 32 || May 25 || @ Robins || 1âÂÂ5 || Pfeffer || McQuillan (2âÂÂ3) || â || â || 15âÂÂ16 |- bgcolor="ffbbbb" | 33 || May 27 || @ Robins || 0âÂÂ2 || Dell || Cooper (1âÂÂ5) || â || â || 15âÂÂ17 |- bgcolor="ccffcc" | 34 || May 28 || @ Robins || 3âÂÂ1 || Mamaux (5âÂÂ1) || Coombs || â || â || 16âÂÂ17 |- bgcolor="ffffff" | 35 || May 29 || Cardinals || 0âÂÂ0 <small>(5)</small> || || || â || â || 16âÂÂ17 |- bgcolor="ffbbbb" | 36 || May 29 || Cardinals || 3âÂÂ5 || Meadows || McQuillan (2âÂÂ4) || â || â || 16âÂÂ18 |- bgcolor="ffbbbb" | 37 || May 30 || @ Reds || 0âÂÂ4 || Schneider || Harmon (4âÂÂ4) || â || â || 16âÂÂ19 |- bgcolor="ccffcc" | 38 || May 31 || Cubs || 1âÂÂ0 || Cooper (2âÂÂ5) || Lavender || â || â || 17âÂÂ19 |- bgcolor="ccffcc" | 39 || May 31 || Cubs || 1âÂÂ0 || Mamaux (6âÂÂ1) || Cheney || â || 15,000 || 18âÂÂ19 |-
|- bgcolor="ffbbbb" | 40 || June 1 || Cubs || 0âÂÂ2 || Zabel || Adams (3âÂÂ4) || â || â || 18âÂÂ20 |- bgcolor="ffbbbb" | 41 || June 4 || Robins || 2âÂÂ8 || Pfeffer || Cooper (2âÂÂ6) || â || â || 18âÂÂ21 |- bgcolor="ccffcc" | 42 || June 5 || Robins || 11âÂÂ0 || Mamaux (7âÂÂ1) || Dell || â || 5,000 || 19âÂÂ21 |- bgcolor="ccffcc" | 43 || June 7 || Robins || 6âÂÂ1 || Adams (4âÂÂ4) || Coombs || â || â || 20âÂÂ21 |- bgcolor="ffbbbb" | 44 || June 8 || Robins || 3âÂÂ4 || Smith || McQuillan (2âÂÂ5) || Pfeffer || 1,800 || 20âÂÂ22 |- bgcolor="ccffcc" | 45 || June 9 || Braves || 7âÂÂ3 || Mamaux (8âÂÂ1) || Tyler || â || â || 21âÂÂ22 |- bgcolor="ccffcc" | 46 || June 10 || Braves || 2âÂÂ1 || Harmon (5âÂÂ4) || Hughes || â || â || 22âÂÂ22 |- bgcolor="ffbbbb" | 47 || June 12 || Braves || 2âÂÂ8 || Ragan || Adams (4âÂÂ5) || â || â || 22âÂÂ23 |- bgcolor="ffbbbb" | 48 || June 14 || Phillies || 1âÂÂ4 <small>(11)</small> || Alexander || Mamaux (8âÂÂ2) || â || 3,500 || 22âÂÂ24 |- bgcolor="ccffcc" | 49 || June 16 || Phillies || 2âÂÂ1 || Harmon (6âÂÂ4) || Chalmers || â || â || 23âÂÂ24 |- bgcolor="ffbbbb" | 50 || June 17 || Giants || 1âÂÂ3 || Marquard || McQuillan (2âÂÂ6) || â || â || 23âÂÂ25 |- bgcolor="ccffcc" | 51 || June 18 || Giants || 7âÂÂ5 || Mamaux (9âÂÂ2) || Perritt || Adams (2) || â || 24âÂÂ25 |- bgcolor="ccffcc" | 52 || June 19 || Giants || 4âÂÂ0 || Harmon (7âÂÂ4) || Tesreau || â || â || 25âÂÂ25 |- bgcolor="ccffcc" | 53 || June 21 || Phillies || 4âÂÂ3 <small>(13)</small> || Mamaux (10âÂÂ2) || Rixey || â || â || 26âÂÂ25 |- bgcolor="ccffcc" | 54 || June 22 || @ Reds || 3âÂÂ1 || McQuillan (3âÂÂ6) || Schneider || â || â || 27âÂÂ25 |- bgcolor="ccffcc" | 55 || June 23 || @ Reds || 6âÂÂ2 || Harmon (8âÂÂ4) || Benton || â || â || 28âÂÂ25 |- bgcolor="ffbbbb" | 56 || June 24 || Reds || 3âÂÂ5 || Toney || Mamaux (10âÂÂ3) || â || â || 28âÂÂ26 |- bgcolor="ccffcc" | 57 || June 26 || Reds || 6âÂÂ3 || McQuillan (4âÂÂ6) || Dale || â || 6,000 || 29âÂÂ26 |- bgcolor="ccffcc" | 58 || June 29 || @ Cardinals || 8âÂÂ5 || Adams (5âÂÂ5) || Meadows || â || â || 30âÂÂ26 |- bgcolor="ffbbbb" | 59 || June 29 || @ Cardinals || 4âÂÂ6 || Robinson || Cooper (2âÂÂ7) || Griner || 10,000 || 30âÂÂ27 |- bgcolor="ffbbbb" | 60 || June 30 || @ Cardinals || 0âÂÂ2 || Doak || Adams (5âÂÂ6) || â || â || 30âÂÂ28 |- bgcolor="ccffcc" | 61 || June 30 || @ Cardinals || 4âÂÂ2 <small>(10)</small> || McQuillan (5âÂÂ6) || Sallee || â || 8,000 || 31âÂÂ28 |-
|- bgcolor="ccffcc" | 62 || July 1 || @ Cubs || 4âÂÂ0 || Mamaux (11âÂÂ3) || Vaughn || â || 1,500 || 32âÂÂ28 |- bgcolor="ffbbbb" | 63 || July 2 || @ Cubs || 1âÂÂ2 || Pierce || Harmon (8âÂÂ5) || â || 2,000 || 32âÂÂ29 |- bgcolor="ffbbbb" | 64 || July 3 || @ Cubs || 5âÂÂ6 || Humphries || Cooper (2âÂÂ8) || Lavender || â || 32âÂÂ30 |- bgcolor="ccffcc" | 65 || July 3 || @ Cubs || 4âÂÂ2 || Adams (6âÂÂ6) || Zabel || â || 12,000 || 33âÂÂ30 |- bgcolor="ffbbbb" | 66 || July 4 || @ Cubs || 5âÂÂ8 || Cheney || McQuillan (5âÂÂ7) || Lavender || â || 33âÂÂ31 |- bgcolor="ffbbbb" | 67 || July 5 || Cardinals || 1âÂÂ3 || Doak || Mamaux (11âÂÂ4) || â || â || 33âÂÂ32 |- bgcolor="ccffcc" | 68 || July 5 || Cardinals || 5âÂÂ0 || Harmon (9âÂÂ5) || Meadows || â || â || 34âÂÂ32 |- bgcolor="ffbbbb" | 69 || July 6 || Cardinals || 1âÂÂ2 || Griner || Kantlehner (0âÂÂ2) || â || 1,200 || 34âÂÂ33 |- bgcolor="ffbbbb" | 70 || July 7 || Cubs || 4âÂÂ7 || Lavender || Adams (6âÂÂ7) || â || â || 34âÂÂ34 |- bgcolor="ccffcc" | 71 || July 8 || @ Phillies || 2âÂÂ0 || Mamaux (12âÂÂ4) || Rixey || â || â || 35âÂÂ34 |- bgcolor="ffbbbb" | 72 || July 9 || @ Phillies || 1âÂÂ2 || Alexander || Harmon (9âÂÂ6) || â || â || 35âÂÂ35 |- bgcolor="ffbbbb" | 73 || July 10 || @ Phillies || 3âÂÂ6 || Demaree || Adams (6âÂÂ8) || â || 12,000 || 35âÂÂ36 |- bgcolor="ccffcc" | 74 || July 12 || @ Phillies || 2âÂÂ1 || McQuillan (6âÂÂ7) || Mayer || Cooper (2) || â || 36âÂÂ36 |- bgcolor="ccffcc" | 75 || July 12 || @ Phillies || 4âÂÂ2 || Mamaux (13âÂÂ4) || Chalmers || â || 13,000 || 37âÂÂ36 |- bgcolor="ccffcc" | 76 || July 13 || @ Braves || 3âÂÂ1 || Kantlehner (1âÂÂ2) || Ragan || â || â || 38âÂÂ36 |- bgcolor="ffbbbb" | 77 || July 13 || @ Braves || 6âÂÂ7 || Davis || Harmon (9âÂÂ7) || Hughes || â || 38âÂÂ37 |- bgcolor="ffbbbb" | 78 || July 15 || @ Braves || 2âÂÂ3 || Rudolph || Cooper (2âÂÂ9) || â || â || 38âÂÂ38 |- bgcolor="ffbbbb" | 79 || July 16 || @ Braves || 5âÂÂ6 <small>(15)</small> || Hughes || Adams (6âÂÂ9) || â || â || 38âÂÂ39 |- bgcolor="ccffcc" | 80 || July 17 || @ Robins || 5âÂÂ3 || McQuillan (7âÂÂ7) || Smith || Kantlehner (1) || â || 39âÂÂ39 |- bgcolor="ffbbbb" | 81 || July 17 || @ Robins || 3âÂÂ7 <small>(7)</small> || Coombs || Conzelman (1âÂÂ1) || â || 22,000 || 39âÂÂ40 |- bgcolor="ffbbbb" | 82 || July 19 || @ Robins || 0âÂÂ3 || Rucker || Kantlehner (1âÂÂ3) || â || â || 39âÂÂ41 |- bgcolor="ccffcc" | 83 || July 20 || @ Robins || 6âÂÂ2 || Harmon (10âÂÂ7) || Douglas || â || â || 40âÂÂ41 |- bgcolor="ccffcc" | 84 || July 23 || @ Giants || 6âÂÂ1 || Adams (7âÂÂ9) || Mathewson || â || â || 41âÂÂ41 |- bgcolor="ccffcc" | 85 || July 23 || @ Giants || 4âÂÂ3 || Mamaux (14âÂÂ4) || Tesreau || Cooper (3) || 15,000 || 42âÂÂ41 |- bgcolor="ffbbbb" | 86 || July 24 || @ Giants || 4âÂÂ8 || Marquard || Harmon (10âÂÂ8) || â || â || 42âÂÂ42 |- bgcolor="ffbbbb" | 87 || July 24 || @ Giants || 2âÂÂ4 || Perritt || Cooper (2âÂÂ10) || â || â || 42âÂÂ43 |- bgcolor="ccffcc" | 88 || July 26 || @ Giants || 2âÂÂ1 || Adams (8âÂÂ9) || Mathewson || â || â || 43âÂÂ43 |- bgcolor="ffbbbb" | 89 || July 26 || @ Giants || 0âÂÂ3 || Tesreau || McQuillan (7âÂÂ8) || â || 10,000 || 43âÂÂ44 |- bgcolor="ccffcc" | 90 || July 27 || Giants || 8âÂÂ1 || Mamaux (15âÂÂ4) || Marquard || â || 4,000 || 44âÂÂ44 |- bgcolor="ccffcc" | 91 || July 29 || Robins || 8âÂÂ2 || Kantlehner (2âÂÂ3) || Pfeffer || â || 2,500 || 45âÂÂ44 |- bgcolor="ffbbbb" | 92 || July 30 || Robins || 2âÂÂ3 || Rucker || Harmon (10âÂÂ9) || â || â || 45âÂÂ45 |- bgcolor="ccffcc" | 93 || July 31 || Robins || 5âÂÂ0 || Mamaux (16âÂÂ4) || Appleton || â || â || 46âÂÂ45 |- bgcolor="ccffcc" | 94 || July 31 || Robins || 5âÂÂ4 <small>(10)</small> || McQuillan (8âÂÂ8) || Pfeffer || â || 12,000 || 47âÂÂ45 |-
|- bgcolor="ffbbbb" | 95 || August 3 || Braves || 4âÂÂ5 || Ragan || Kantlehner (2âÂÂ4) || Hughes || â || 47âÂÂ46 |- bgcolor="ffbbbb" | 96 || August 3 || Braves || 2âÂÂ7 || Tyler || Harmon (10âÂÂ10) || â || â || 47âÂÂ47 |- bgcolor="ffbbbb" | 97 || August 4 || Braves || 1âÂÂ5 || Hughes || Mamaux (16âÂÂ5) || â || â || 47âÂÂ48 |- bgcolor="ccffcc" | 98 || August 5 || Phillies || 1âÂÂ0 || Adams (9âÂÂ9) || Alexander || â || â || 48âÂÂ48 |- bgcolor="ffbbbb" | 99 || August 6 || Phillies || 4âÂÂ5 || Demaree || McQuillan (8âÂÂ9) || Mayer || â || 48âÂÂ49 |- bgcolor="ccffcc" | 100 || August 7 || Phillies || 9âÂÂ0 || Mamaux (17âÂÂ5) || Mayer || â || â || 49âÂÂ49 |- bgcolor="ccffcc" | 101 || August 7 || Phillies || 6âÂÂ0 || Harmon (11âÂÂ10) || Rixey || â || â || 50âÂÂ49 |- bgcolor="ccffcc" | 102 || August 10 || Giants || 8âÂÂ2 || Adams (10âÂÂ9) || Marquard || â || â || 51âÂÂ49 |- bgcolor="ccffcc" | 103 || August 12 || Giants || 4âÂÂ0 || Mamaux (18âÂÂ5) || Tesreau || â || â || 52âÂÂ49 |- bgcolor="ffbbbb" | 104 || August 13 || Reds || 3âÂÂ4 || McKenry || Harmon (11âÂÂ11) || â || â || 52âÂÂ50 |- bgcolor="ffbbbb" | 105 || August 14 || Reds || 4âÂÂ5 <small>(11)</small> || Lear || Kantlehner (2âÂÂ5) || â || â || 52âÂÂ51 |- bgcolor="ffbbbb" | 106 || August 14 || Reds || 0âÂÂ6 || Toney || McQuillan (8âÂÂ10) || â || â || 52âÂÂ52 |- bgcolor="ffbbbb" | 107 || August 15 || @ Reds || 2âÂÂ6 || Dale || Cooper (2âÂÂ11) || â || â || 52âÂÂ53 |- bgcolor="ffbbbb" | 108 || August 15 || @ Reds || 2âÂÂ6 || McKenry || Harmon (11âÂÂ12) || â || â || 52âÂÂ54 |- bgcolor="ccffcc" | 109 || August 16 || Reds || 5âÂÂ4 || Kantlehner (3âÂÂ5) || Lear || â || â || 53âÂÂ54 |- bgcolor="ffbbbb" | 110 || August 17 || Cubs || 4âÂÂ6 || Zabel || Cooper (2âÂÂ12) || â || â || 53âÂÂ55 |- bgcolor="ccffcc" | 111 || August 18 || @ Phillies || 8âÂÂ4 || Adams (11âÂÂ9) || Mayer || â || â || 54âÂÂ55 |- bgcolor="ccffcc" | 112 || August 19 || @ Phillies || 8âÂÂ3 || Harmon (12âÂÂ12) || Demaree || â || â || 55âÂÂ55 |- bgcolor="ffbbbb" | 113 || August 20 || @ Phillies || 3âÂÂ4 <small>(11)</small> || Alexander || Cooper (2âÂÂ13) || â || â || 55âÂÂ56 |- bgcolor="ffbbbb" | 114 || August 21 || @ Braves || 1âÂÂ3 || Rudolph || Kantlehner (3âÂÂ6) || â || â || 55âÂÂ57 |- bgcolor="ffbbbb" | 115 || August 21 || @ Braves || 0âÂÂ2 || Nehf || Mamaux (18âÂÂ6) || â || 20,000 || 55âÂÂ58 |- bgcolor="ffbbbb" | 116 || August 23 || @ Braves || 2âÂÂ3 || Hughes || Adams (11âÂÂ10) || â || â || 55âÂÂ59 |- bgcolor="ffbbbb" | 117 || August 24 || @ Braves || 0âÂÂ10 || Ragan || Cooper (2âÂÂ14) || â || â || 55âÂÂ60 |- bgcolor="ffbbbb" | 118 || August 25 || @ Giants || 3âÂÂ5 || Perritt || Harmon (12âÂÂ13) || â || â || 55âÂÂ61 |- bgcolor="ccffcc" | 119 || August 25 || @ Giants || 9âÂÂ7 || Mamaux (19âÂÂ6) || Benton || Kantlehner (2) || â || 56âÂÂ61 |- bgcolor="ccffcc" | 120 || August 26 || @ Giants || 2âÂÂ1 || Kantlehner (4âÂÂ6) || Stroud || â || â || 57âÂÂ61 |- bgcolor="ffbbbb" | 121 || August 27 || @ Giants || 1âÂÂ2 || Mathewson || Adams (11âÂÂ11) || â || â || 57âÂÂ62 |- bgcolor="ffbbbb" | 122 || August 28 || @ Robins || 1âÂÂ2 || Rucker || Harmon (12âÂÂ14) || â || â || 57âÂÂ63 |- bgcolor="ffbbbb" | 123 || August 28 || @ Robins || 0âÂÂ3 || Pfeffer || Kantlehner (4âÂÂ7) || â || 13,000 || 57âÂÂ64 |- bgcolor="ccffcc" | 124 || August 31 || @ Robins || 5âÂÂ3 || Kelly (1âÂÂ0) || Coombs || Cooper (4) || â || 58âÂÂ64 |- bgcolor="ffbbbb" | 125 || August 31 || @ Robins || 2âÂÂ3 || Marquard || Kantlehner (4âÂÂ8) || â || â || 58âÂÂ65 |-
|- bgcolor="ffbbbb" | 126 || September 1 || Cardinals || 0âÂÂ4 || Sallee || Adams (11âÂÂ12) || â || â || 58âÂÂ66 |- bgcolor="ccffcc" | 127 || September 1 || Cardinals || 7âÂÂ0 || Harmon (13âÂÂ14) || Perdue || â || â || 59âÂÂ66 |- bgcolor="ffbbbb" | 128 || September 2 || Cardinals || 2âÂÂ7 || Doak || Kelly (1âÂÂ1) || â || â || 59âÂÂ67 |- bgcolor="ccffcc" | 129 || September 3 || Cubs || 4âÂÂ1 || Mamaux (20âÂÂ6) || Humphries || â || â || 60âÂÂ67 |- bgcolor="ffbbbb" | 130 || September 4 || Cubs || 2âÂÂ5 || Vaughn || Kantlehner (4âÂÂ9) || â || â || 60âÂÂ68 |- bgcolor="ccffcc" | 131 || September 4 || Cubs || 2âÂÂ1 <small>(12)</small> || Adams (12âÂÂ12) || Lavender || â || 7,000 || 61âÂÂ68 |- bgcolor="ccffcc" | 132 || September 5 || @ Cubs || 13âÂÂ2 || Cooper (3âÂÂ14) || Adams || â || â || 62âÂÂ68 |- bgcolor="ffbbbb" | 133 || September 6 || Reds || 0âÂÂ3 || Schneider || Mamaux (20âÂÂ7) || â || â || 62âÂÂ69 |- bgcolor="ccffcc" | 134 || September 6 || Reds || 5âÂÂ2 || Harmon (14âÂÂ14) || McKenry || â || 8,000 || 63âÂÂ69 |- bgcolor="ffbbbb" | 135 || September 7 || Reds || 3âÂÂ6 || Toney || Adams (12âÂÂ13) || â || â || 63âÂÂ70 |- bgcolor="ccffcc" | 136 || September 10 || Braves || 8âÂÂ1 || Adams (13âÂÂ13) || Nehf || â || â || 64âÂÂ70 |- bgcolor="ffbbbb" | 137 || September 10 || Braves || 2âÂÂ3 <small>(10)</small> || Rudolph || Kantlehner (4âÂÂ10) || â || 4,500 || 64âÂÂ71 |- bgcolor="ffbbbb" | 138 || September 11 || Phillies || 2âÂÂ3 || Mayer || Harmon (14âÂÂ15) || â || â || 64âÂÂ72 |- bgcolor="ffbbbb" | 139 || September 13 || Phillies || 2âÂÂ4 <small>(13)</small> || Alexander || Cooper (3âÂÂ15) || â || â || 64âÂÂ73 |- bgcolor="ffbbbb" | 140 || September 14 || Phillies || 3âÂÂ4 || Chalmers || Adams (13âÂÂ14) || â || â || 64âÂÂ74 |- bgcolor="ccffcc" | 141 || September 15 || Phillies || 1âÂÂ0 || Kantlehner (5âÂÂ10) || Mayer || â || â || 65âÂÂ74 |- bgcolor="ffbbbb" | 142 || September 16 || Giants || 4âÂÂ8 || Tesreau || Harmon (14âÂÂ16) || â || â || 65âÂÂ75 |- bgcolor="ccffcc" | 143 || September 17 || Giants || 9âÂÂ6 || Cooper (4âÂÂ15) || Benton || â || â || 66âÂÂ75 |- bgcolor="ccffcc" | 144 || September 17 || Giants || 5âÂÂ0 || Hill (1âÂÂ0) || Perritt || â || â || 67âÂÂ75 |- bgcolor="ccffcc" | 145 || September 18 || Giants || 8âÂÂ2 || Mamaux (21âÂÂ7) || Mathewson || â || â || 68âÂÂ75 |- bgcolor="ffbbbb" | 146 || September 18 || Giants || 2âÂÂ7 || Tesreau || Kantlehner (5âÂÂ11) || â || â || 68âÂÂ76 |- bgcolor="ccffcc" | 147 || September 20 || Robins || 1âÂÂ0 || Harmon (15âÂÂ16) || Pfeffer || â || â || 69âÂÂ76 |- bgcolor="ffbbbb" | 148 || September 22 || Robins || 2âÂÂ4 || Rucker || Cooper (4âÂÂ16) || â || â || 69âÂÂ77 |- bgcolor="ccffcc" | 149 || September 22 || Robins || 2âÂÂ1 || Hill (2âÂÂ0) || Cheney || â || â || 70âÂÂ77 |- bgcolor="ccffcc" | 150 || September 23 || Braves || 8âÂÂ4 || Cooper (5âÂÂ16) || Rudolph || â || â || 71âÂÂ77 |- bgcolor="ffbbbb" | 151 || September 24 || Braves || 0âÂÂ2 || Nehf || Kantlehner (5âÂÂ12) || â || â || 71âÂÂ78 |- bgcolor="ffbbbb" | 152 || September 25 || Braves || 2âÂÂ5 || Hughes || Harmon (15âÂÂ17) || â || â || 71âÂÂ79 |- bgcolor="ccffcc" | 153 || September 30 || @ Cardinals || 6âÂÂ5 <small>(10)</small> || Harmon (16âÂÂ17) || Perdue || â || â || 72âÂÂ79 |-
|- bgcolor="ffbbbb" | 154 || October 1 || @ Cardinals || 3âÂÂ6 || Doak || Hill (2âÂÂ1) || Sallee || â || 72âÂÂ80 |- bgcolor="ffbbbb" | 155 || October 2 || @ Cardinals || 1âÂÂ3 || Ames || Mamaux (21âÂÂ8) || â || â || 72âÂÂ81 |- bgcolor="ccffcc" | 156 || October 3 || @ Reds || 5âÂÂ3 || Adams (14âÂÂ14) || Schneider || â || â || 73âÂÂ81 |-
|- | Legend: = Win = Loss = Tie<br>Bold = Pirates team member
Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in
Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts
Note: G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts