The 1886 Pittsburgh Alleghenys season was the fifth season of the Pittsburgh Alleghenys franchise. The Alleghenys finished second in the American Association with a record of 80âÂÂ57.
|- style="background:#fbb;" | 1 || Sunday, Apr 18 || @ St. Louis Browns || 4âÂÂ8 || 0âÂÂ1 |- style="background:#fbb;" | 2 || Sunday, Apr 18 || @ St. Louis Browns || 5âÂÂ10 || 0âÂÂ2 |- style="background:#cfc;" | 3 || Monday, Apr 19 || @ St. Louis Browns || 6âÂÂ5 || 1âÂÂ2 |- style="background:#fbb;" | 4 || Tuesday, Apr 20 || @ St. Louis Browns || 10âÂÂ11 || 1âÂÂ3 |- style="background:#cfc;" | 5 || Wednesday, Apr 21 || @ Cincinnati Red Stockings || 13âÂÂ7 || 2âÂÂ3 |- style="background:#fbb;" | 6 || Thursday, Apr 22 || @ Cincinnati Red Stockings || 8âÂÂ9 || 2âÂÂ4 |- style="background:#fbb;" | 7 || Friday, Apr 23 || @ Cincinnati Red Stockings || 7âÂÂ13 || 2âÂÂ5 |- style="background:#fbb;" | 8 || Saturday, Apr 24 || @ Cincinnati Red Stockings || 10âÂÂ14 || 2âÂÂ6 |- style="background:#cfc;" | 9 || Monday, Apr 26 || @ Louisville Colonels || 8âÂÂ3 || 3âÂÂ6 |- style="background:#cfc;" | 10 || Tuesday, Apr 27 || @ Louisville Colonels || 8âÂÂ3 || 4âÂÂ6 |- style="background:#fbb;" | 11 || Wednesday, Apr 28 || @ Louisville Colonels || 1âÂÂ2 || 4âÂÂ7 |-
|- style="background:#fbb;" | 12 || Saturday, May 1 || St. Louis Browns || 4âÂÂ5 || 4âÂÂ8 |- style="background:#cfc;" | 13 || Monday, May 3 || St. Louis Browns || 7âÂÂ6 || 5âÂÂ8 |- style="background:#fbb;" | 14 || Tuesday, May 4 || St. Louis Browns || 7âÂÂ14 || 5âÂÂ9 |- style="background:#cfc;" | 15 || Thursday, May 6 || St. Louis Browns || 6âÂÂ0 || 6âÂÂ9 |- style="background:#cfc;" | 16 || Saturday, May 8 || Cincinnati Red Stockings || 9âÂÂ6 || 7âÂÂ9 |- style="background:#fbb;" | 17 || Monday, May 10 || Cincinnati Red Stockings || 2âÂÂ4 || 7âÂÂ10 |- style="background:#cfc;" | 18 || Tuesday, May 11 || Cincinnati Red Stockings || 9âÂÂ7 || 8âÂÂ10 |- style="background:#cfc;" | 19 || Wednesday, May 12 || Cincinnati Red Stockings || 9âÂÂ7 || 9âÂÂ10 |- style="background:#cfc;" | 20 || Thursday, May 13 || Louisville Colonels || 4âÂÂ2 || 10âÂÂ10 |- style="background:#fbb;" | 21 || Friday, May 14 || Louisville Colonels || 1âÂÂ4 || 10âÂÂ11 |- style="background:#fbb;" | 22 || Saturday, May 15 || Louisville Colonels || 2âÂÂ6 || 10âÂÂ12 |- style="background:#cfc;" | 23 || Monday, May 17 || Louisville Colonels || 5âÂÂ3 || 11âÂÂ12 |- style="background:#fbb;" | 24 || Tuesday, May 18 || @ New York Metropolitans || 4âÂÂ14 || 11âÂÂ13 |- style="background:#cfc;" | 25 || Wednesday, May 19 || @ New York Metropolitans || 6âÂÂ4 || 12âÂÂ13 |- style="background:#cfc;" | 26 || Thursday, May 20 || @ Brooklyn Grays || 1âÂÂ0 || 13âÂÂ13 |- style="background:#cfc;" | 27 || Friday, May 21 || @ Brooklyn Grays || 6âÂÂ4 || 14âÂÂ13 |- style="background:#cfc;" | 28 || Saturday, May 22 || @ New York Metropolitans || 5âÂÂ4 || 15âÂÂ13 |- style="background:#cfc;" | 29 || Tuesday, May 25 || @ Brooklyn Grays || 6âÂÂ4 || 16âÂÂ13 |- style="background:#fbb;" | 30 || Wednesday, May 26 || @ Brooklyn Grays || 3âÂÂ7 || 16âÂÂ14 |- style="background:#cfc;" | 31 || Thursday, May 27 || @ Baltimore Orioles || 6âÂÂ5 || 17âÂÂ14 |- style="background:#fbb;" | 32 || Friday, May 28 || @ Baltimore Orioles || 1âÂÂ4 || 17âÂÂ15 |- style="background:#cfc;" | 33 || Saturday, May 29 || Baltimore Orioles || 15âÂÂ5 || 18âÂÂ15 |- style="background:#cfc;" | 34 || Saturday, May 29 || Baltimore Orioles || 4âÂÂ0 || 19âÂÂ15 |-
|- style="background:#fbb;" | 35 || Tuesday, Jun 1 || @ Philadelphia Athletics || 6âÂÂ16 || 19âÂÂ16 |- style="background:#cfc;" | 36 || Wednesday, Jun 2 || @ Philadelphia Athletics || 6âÂÂ1 || 20âÂÂ16 |- style="background:#fbb;" | 37 || Thursday, Jun 3 || @ Philadelphia Athletics || 5âÂÂ12 || 20âÂÂ17 |- style="background:#cfc;" | 38 || Friday, Jun 4 || @ Philadelphia Athletics || 16âÂÂ8 || 21âÂÂ17 |- style="background:#cfc;" | 39 || Saturday, Jun 5 || Cincinnati Red Stockings || 3âÂÂ1 || 22âÂÂ17 |- style="background:#cfc;" | 40 || Monday, Jun 7 || Cincinnati Red Stockings || 3âÂÂ0 || 23âÂÂ17 |- style="background:#fbb;" | 41 || Tuesday, Jun 8 || Cincinnati Red Stockings || 9âÂÂ10 || 23âÂÂ18 |- style="background:#cfc;" | 42 || Thursday, Jun 10 || @ Cincinnati Red Stockings || 5âÂÂ1 || 24âÂÂ18 |- style="background:#fbb;" | 43 || Friday, Jun 11 || @ Cincinnati Red Stockings || 3âÂÂ5 || 24âÂÂ19 |- style="background:#cfc;" | 44 || Saturday, Jun 12 || @ Cincinnati Red Stockings || 6âÂÂ5 || 25âÂÂ19 |- style="background:#fbb;" | 45 || Sunday, Jun 13 || @ St. Louis Browns || 0âÂÂ2 || 25âÂÂ20 |- style="background:#fbb;" | 46 || Wednesday, Jun 16 || @ St. Louis Browns || 0âÂÂ1 || 25âÂÂ21 |- style="background:#fbb;" | 47 || Friday, Jun 18 || Louisville Colonels || 4âÂÂ9 || 25âÂÂ22 |- style="background:#fbb;" | 48 || Saturday, Jun 19 || Louisville Colonels || 2âÂÂ3 || 25âÂÂ23 |- style="background:#cfc;" | 49 || Monday, Jun 21 || Louisville Colonels || 8âÂÂ2 || 26âÂÂ23 |- style="background:#cfc;" | 50 || Wednesday, Jun 23 || St. Louis Browns || 3âÂÂ0 || 27âÂÂ23 |- style="background:#fbb;" | 51 || Thursday, Jun 24 || St. Louis Browns || 1âÂÂ2 || 27âÂÂ24 |- style="background:#fbb;" | 52 || Friday, Jun 25 || @ Louisville Colonels || 5âÂÂ19 || 27âÂÂ25 |- style="background:#cfc;" | 53 || Saturday, Jun 26 || @ Louisville Colonels || 4âÂÂ3 || 28âÂÂ25 |- style="background:#cfc;" | 54 || Monday, Jun 28 || Philadelphia Athletics || 9âÂÂ1 || 29âÂÂ25 |- style="background:#cfc;" | 55 || Tuesday, Jun 29 || Philadelphia Athletics || 7âÂÂ2 || 30âÂÂ25 |- style="background:#cfc;" | 56 || Wednesday, Jun 30 || Philadelphia Athletics || 12âÂÂ3 || 31âÂÂ25 |-
|- style="background:#fbb;" | 57 || Thursday, Jul 1 || Philadelphia Athletics || 4âÂÂ5 || 31âÂÂ26 |- style="background:#cfc;" | 58 || Friday, Jul 2 || Baltimore Orioles || 6âÂÂ0 || 32âÂÂ26 |- style="background:#fbb;" | 59 || Saturday, Jul 3 || Baltimore Orioles || 3âÂÂ12 || 32âÂÂ27 |- style="background:#cfc;" | 60 || Monday, Jul 5 || Baltimore Orioles || 15âÂÂ1 || 33âÂÂ27 |- style="background:#cfc;" | 61 || Monday, Jul 5 || Baltimore Orioles || 13âÂÂ2 || 34âÂÂ27 |- style="background:#cfc;" | 62 || Wednesday, Jul 7 || Brooklyn Grays || 6âÂÂ2 || 35âÂÂ27 |- style="background:#cfc;" | 63 || Thursday, Jul 8 || Brooklyn Grays || 8âÂÂ1 || 36âÂÂ27 |- style="background:#fbb;" | 64 || Friday, Jul 9 || Brooklyn Grays || 0âÂÂ4 || 36âÂÂ28 |- style="background:#fbb;" | 65 || Saturday, Jul 10 || Brooklyn Grays || 4âÂÂ5 || 36âÂÂ29 |- style="background:#fbb;" | 66 || Monday, Jul 12 || New York Metropolitans || 2âÂÂ4 || 36âÂÂ30 |- style="background:#cfc;" | 67 || Tuesday, Jul 13 || New York Metropolitans || 9âÂÂ3 || 37âÂÂ30 |- style="background:#cfc;" | 68 || Wednesday, Jul 14 || New York Metropolitans || 4âÂÂ1 || 38âÂÂ30 |- style="background:#cfc;" | 69 || Thursday, Jul 15 || New York Metropolitans || 5âÂÂ3 || 39âÂÂ30 |- style="background:#cfc;" | 70 || Saturday, Jul 17 || @ Baltimore Orioles || 7âÂÂ6 || 40âÂÂ30 |- style="background:#cfc;" | 71 || Monday, Jul 19 || @ Baltimore Orioles || 5âÂÂ4 || 41âÂÂ30 |- style="background:#fbb;" | 72 || Tuesday, Jul 20 || @ Baltimore Orioles || 2âÂÂ5 || 41âÂÂ31 |- style="background:#fbb;" | 73 || Wednesday, Jul 21 || @ Baltimore Orioles || 1âÂÂ6 || 41âÂÂ32 |- style="background:#fbb;" | 74 || Thursday, Jul 22 || @ Philadelphia Athletics || 4âÂÂ7 || 41âÂÂ33 |- style="background:#cfc;" | 75 || Friday, Jul 23 || @ Philadelphia Athletics || 17âÂÂ6 || 42âÂÂ33 |- style="background:#fbb;" | 76 || Saturday, Jul 24 || @ Philadelphia Athletics || 6âÂÂ7 || 42âÂÂ34 |- style="background:#fbb;" | 77 || Sunday, Jul 25 || @ Brooklyn Grays || 3âÂÂ6 || 42âÂÂ35 |- style="background:#fbb;" | 78 || Tuesday, Jul 27 || @ New York Metropolitans || 1âÂÂ8 || 42âÂÂ36 |- style="background:#fbb;" | 79 || Wednesday, Jul 28 || @ Brooklyn Grays || 6âÂÂ10 || 42âÂÂ37 |- style="background:#cfc;" | 80 || Thursday, Jul 29 || @ New York Metropolitans || 11âÂÂ2 || 43âÂÂ37 |- style="background:#fbb;" | 81 || Saturday, Jul 31 || @ New York Metropolitans || 6âÂÂ7 || 43âÂÂ38 |-
|- style="background:#cfc;" | 82 || Sunday, Aug 1 || @ Brooklyn Grays || 10âÂÂ9 || 44âÂÂ38 |- style="background:#cfc;" | 83 || Tuesday, Aug 3 || Brooklyn Grays || 18âÂÂ0 || 45âÂÂ38 |- style="background:#cfc;" | 84 || Wednesday, Aug 4 || Brooklyn Grays || 5âÂÂ3 || 46âÂÂ38 |- style="background:#fbb;" | 85 || Thursday, Aug 5 || Brooklyn Grays || 3âÂÂ4 || 46âÂÂ39 |- style="background:#fbb;" | 86 || Friday, Aug 6 || Baltimore Orioles || 1âÂÂ3 || 46âÂÂ40 |- style="background:#cfc;" | 87 || Saturday, Aug 7 || Baltimore Orioles || 11âÂÂ2 || 47âÂÂ40 |- style="background:#cfc;" | 88 || Monday, Aug 9 || Baltimore Orioles || 7âÂÂ2 || 48âÂÂ40 |- style="background:#cfc;" | 89 || Tuesday, Aug 10 || Philadelphia Athletics || 14âÂÂ7 || 49âÂÂ40 |- style="background:#fbb;" | 90 || Wednesday, Aug 11 || Philadelphia Athletics || 2âÂÂ3 || 49âÂÂ41 |- style="background:#cfc;" | 91 || Thursday, Aug 12 || Philadelphia Athletics || 7âÂÂ4 || 50âÂÂ41 |- style="background:#cfc;" | 92 || Monday, Aug 16 || New York Metropolitans || 1âÂÂ0 || 51âÂÂ41 |- style="background:#fbb;" | 93 || Tuesday, Aug 17 || New York Metropolitans || 5âÂÂ7 || 51âÂÂ42 |- style="background:#fbb;" | 94 || Wednesday, Aug 18 || New York Metropolitans || 0âÂÂ2 || 51âÂÂ43 |- style="background:#cfc;" | 95 || Thursday, Aug 19 || @ St. Louis Browns || 6âÂÂ0 || 52âÂÂ43 |- style="background:#cfc;" | 96 || Friday, Aug 20 || @ St. Louis Browns || 3âÂÂ0 || 53âÂÂ43 |- style="background:#fbb;" | 97 || Saturday, Aug 21 || @ St. Louis Browns || 3âÂÂ7 || 53âÂÂ44 |- style="background:#cfc;" | 98 || Sunday, Aug 22 || @ St. Louis Browns || 6âÂÂ4 || 54âÂÂ44 |- style="background:#cfc;" | 99 || Monday, Aug 23 || @ Louisville Colonels || 6âÂÂ3 || 55âÂÂ44 |- style="background:#cfc;" | 100 || Tuesday, Aug 24 || @ Louisville Colonels || 7âÂÂ3 || 56âÂÂ44 |- style="background:#cfc;" | 101 || Wednesday, Aug 25 || @ Louisville Colonels || 7âÂÂ2 || 57âÂÂ44 |- style="background:#cfc;" | 102 || Thursday, Aug 26 || @ Louisville Colonels || 7âÂÂ0 || 58âÂÂ44 |- style="background:#cfc;" | 103 || Friday, Aug 27 || @ Cincinnati Red Stockings || 11âÂÂ8 || 59âÂÂ44 |- style="background:#cfc;" | 104 || Saturday, Aug 28 || @ Cincinnati Red Stockings || 10âÂÂ2 || 60âÂÂ44 |- style="background:#cfc;" | 105 || Sunday, Aug 29 || @ Cincinnati Red Stockings || 11âÂÂ9 || 61âÂÂ44 |- style="background:#cfc;" | 106 || Tuesday, Aug 31 || Louisville Colonels || 7âÂÂ5 || 62âÂÂ44 |-
|- style="background:#fbb;" | 107 || Wednesday, Sep 1 || Louisville Colonels || 1âÂÂ5 || 62âÂÂ45 |- style="background:#cfc;" | 108 || Thursday, Sep 2 || Louisville Colonels || 6âÂÂ2 || 63âÂÂ45 |- style="background:#fbb;" | 109 || Friday, Sep 3 || Cincinnati Red Stockings || 3âÂÂ5 || 63âÂÂ46 |- style="background:#cfc;" | 110 || Saturday, Sep 4 || Cincinnati Red Stockings || 1âÂÂ0 || 64âÂÂ46 |- style="background:#cfc;" | 111 || Monday, Sep 6 || Cincinnati Red Stockings || 13âÂÂ4 || 65âÂÂ46 |- style="background:#fbb;" | 112 || Tuesday, Sep 7 || St. Louis Browns || 1âÂÂ2 || 65âÂÂ47 |- style="background:#fbb;" | 113 || Wednesday, Sep 8 || St. Louis Browns || 4âÂÂ8 || 65âÂÂ48 |- style="background:#fbb;" | 114 || Wednesday, Sep 8 || St. Louis Browns || 2âÂÂ6 || 65âÂÂ49 |- style="background:#cfc;" | 115 || Thursday, Sep 9 || St. Louis Browns || 4âÂÂ3 || 66âÂÂ49 |- style="background:#cfc;" | 116 || Friday, Sep 10 || @ Philadelphia Athletics || 4âÂÂ3 || 67âÂÂ49 |- style="background:#fbb;" | 117 || Saturday, Sep 11 || @ Philadelphia Athletics || 10âÂÂ18 || 67âÂÂ50 |- style="background:#ffc;" | 118 || Monday, Sep 13 || @ Philadelphia Athletics || 7âÂÂ7 || 67âÂÂ50 |- style="background:#ffc;" | 119 || Tuesday, Sep 14 || @ Baltimore Orioles || 3âÂÂ3 || 67âÂÂ50 |- style="background:#cfc;" | 120 || Thursday, Sep 16 || @ Baltimore Orioles || 6âÂÂ0 || 68âÂÂ50 |- style="background:#fbb;" | 121 || Friday, Sep 17 || @ New York Metropolitans || 4âÂÂ7 || 68âÂÂ51 |- style="background:#cfc;" | 122 || Saturday, Sep 18 || @ Brooklyn Grays || 7âÂÂ4 || 69âÂÂ51 |- style="background:#fbb;" | 123 || Monday, Sep 20 || @ New York Metropolitans || 5âÂÂ7 || 69âÂÂ52 |- style="background:#fbb;" | 124 || Tuesday, Sep 21 || @ Brooklyn Grays || 7âÂÂ10 || 69âÂÂ53 |- style="background:#cfc;" | 125 || Wednesday, Sep 22 || @ New York Metropolitans || 7âÂÂ0 || 70âÂÂ53 |- style="background:#cfc;" | 126 || Thursday, Sep 23 || @ Brooklyn Grays || 8âÂÂ2 || 71âÂÂ53 |- style="background:#cfc;" | 127 || Saturday, Sep 25 || Philadelphia Athletics || 5âÂÂ1 || 72âÂÂ53 |- style="background:#cfc;" | 128 || Monday, Sep 27 || Philadelphia Athletics || 5âÂÂ1 || 73âÂÂ53 |- style="background:#fbb;" | 129 || Wednesday, Sep 29 || Philadelphia Athletics || 3âÂÂ6 || 73âÂÂ54 |- style="background:#cfc;" | 130 || Thursday, Sep 30 || Brooklyn Grays || 12âÂÂ0 || 74âÂÂ54 |-
|- style="background:#cfc;" | 131 || Friday, Oct 1 || Brooklyn Grays || 7âÂÂ2 || 75âÂÂ54 |- style="background:#fbb;" | 132 || Saturday, Oct 2 || Brooklyn Grays || 4âÂÂ6 || 75âÂÂ55 |- style="background:#fbb;" | 133 || Tuesday, Oct 5 || Baltimore Orioles || 3âÂÂ6 || 75âÂÂ56 |- style="background:#ffc;" | 134 || Tuesday, Oct 5 || Baltimore Orioles || 3âÂÂ3 || 75âÂÂ56 |- style="background:#fbb;" | 135 || Wednesday, Oct 6 || Baltimore Orioles || 0âÂÂ6 || 75âÂÂ57 |- style="background:#cfc;" | 136 || Thursday, Oct 7 || Baltimore Orioles || 7âÂÂ1 || 76âÂÂ57 |- style="background:#cfc;" | 137 || Friday, Oct 8 || New York Metropolitans || 9âÂÂ0 || 77âÂÂ57 |- style="background:#cfc;" | 138 || Saturday, Oct 9 || New York Metropolitans || 4âÂÂ2 || 78âÂÂ57 |- style="background:#cfc;" | 139 || Monday, Oct 11 || New York Metropolitans || 4âÂÂ1 || 79âÂÂ57 |- style="background:#cfc;" | 140 || Tuesday, Oct 12 || New York Metropolitans || 7âÂÂ2 || 80âÂÂ57 |-
|- style="text-align:center;" | Legend: = Win = Loss = Tie
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