The 1920 Pittsburgh Pirates season was the 39th in franchise history; the 34th in the National League.
Regular season Pirates pitcher Babe Adams had outstanding control, allowing only 18 bases on balls in 263 innings pitched.Great Baseball Feats, Facts and Figures, 2008 Edition, p.88, David Nemec and Scott Flatow, A Signet Book, Penguin Group, New York, NY, October 2, 1920: The Cincinnati Reds and the Pirates played in the last tripleheader to date and the only one in the modern World Series era (post-1903). Umpire Peter Harrison officiated all three games.Great Baseball Feats, Facts and Figures, 2008 Edition, p.43, David Nemec and Scott Flatow, A Signet Book, Penguin Group, New York, NY,
Season standings
Record vs. opponents
Game log
|- bgcolor="ccffcc" | 1 || April 14 || @ Cardinals || 5–4 (10) || Adams (1–0) || Goodwin || Hamilton (1) || — || 1–0 |- bgcolor="ffbbbb" | 2 || April 15 || @ Cardinals || 2–3 || Schupp || Cooper (0–1) || — || — || 1–1 |- bgcolor="ccffcc" | 3 || April 16 || @ Cardinals || 5–0 || Carlson (1–0) || Sherdel || — || — || 2–1 |- bgcolor="ccffcc" | 4 || April 17 || @ Cardinals || 3–0 (13) || Ponder (1–0) || Haines || — || — || 3–1 |- bgcolor="ccffcc" | 5 || April 18 || @ Reds || 2–1 || Adams (2–0) || Ruether || — || — || 4–1 |- bgcolor="ccffcc" | 6 || April 21 || @ Reds || 5–3 || Cooper (1–1) || Ring || — || — || 5–1 |- bgcolor="ffbbbb" | 7 || April 23 || Cardinals || 7–9 || Jacobs || Hamilton (0–1) || — || — || 5–2 |- bgcolor="ffbbbb" | 8 || April 24 || Cardinals || 0–6 || Doak || Ponder (1–1) || — || — || 5–3 |- bgcolor="ccffcc" | 9 || April 25 || @ Cubs || 4–1 (15) || Adams (3–0) || Hendrix || — || — || 6–3 |- bgcolor="ffbbbb" | 10 || April 28 || @ Cubs || 1–11 || Alexander || Cooper (1–2) || — || — || 6–4 |- bgcolor="ffbbbb" | 11 || April 29 || Reds || 2–8 || Ring || Carlson (1–1) || — || — || 6–5
|- bgcolor="ffbbbb" | 12 || May 1 || Reds || 1–7 || Ruether || Adams (3–1) || — || — || 6–6 |- bgcolor="ccffcc" | 13 || May 2 || @ Reds || 3–0 || Cooper (2–2) || Sallee || — || — || 7–6 |- bgcolor="ccffcc" | 14 || May 5 || Cubs || 2–0 || Adams (4–1) || Martin || — || — || 8–6 |- bgcolor="ccffcc" | 15 || May 6 || Cubs || 3–1 || Cooper (3–2) || Hendrix || — || — || 9–6 |- bgcolor="ffbbbb" | 16 || May 7 || Cubs || 4–6 || Alexander || Carlson (1–2) || — || — || 9–7 |- bgcolor="ffbbbb" | 17 || May 8 || Cubs || 1–4 || Vaughn || Hamilton (0–2) || — || — || 9–8 |- bgcolor="ffbbbb" | 18 || May 9 || @ Cubs || 7–8 || Martin || Adams (4–2) || Carter || — || 9–9 |- bgcolor="ccffcc" | 19 || May 10 || Phillies || 3–1 || Cooper (4–2) || Causey || — || — || 10–9 |- bgcolor="ccffcc" | 20 || May 12 || Phillies || 5–3 || Hamilton (1–2) || Rixey || — || — || 11–9 |- bgcolor="ffbbbb" | 21 || May 15 || Giants || 0–2 || Nehf || Adams (4–3) || — || 12,000 || 11–10 |- bgcolor="ccffcc" | 22 || May 17 || Giants || 7–6 (15) || Ponder (2–1) || Douglas || — || 6,000 || 12–10 |- bgcolor="ccffcc" | 23 || May 18 || Braves || 7–2 || Hamilton (2–2) || Oeschger || — || — || 13–10 |- bgcolor="ccffcc" | 24 || May 19 || Braves || 2–1 || Cooper (5–2) || McQuillan || — || — || 14–10 |- bgcolor="ccffcc" | 25 || May 20 || Braves || 5–1 || Adams (5–3) || Fillingim || — || — || 15–10 |- bgcolor="ccffcc" | 26 || May 21 || Braves || 9–0 || Carlson (2–2) || Eayrs || — || — || 16–10 |- bgcolor="ffbbbb" | 27 || May 22 || Robins || 1–4 || Grimes || Cooper (5–3) || — || 18,000 || 16–11 |- bgcolor="ccffcc" | 28 || May 23 || @ Robins || 1–0 || Ponder (3–1) || Pfeffer || — || 10,000 || 17–11 |- bgcolor="ffbbbb" | 29 || May 24 || Robins || 0–1 || Mamaux || Adams (5–4) || — || 2,500 || 17–12 |- bgcolor="ccffcc" | 30 || May 25 || Robins || 2–0 || Carlson (3–2) || Cadore || — || 3,000 || 18–12 |- bgcolor="ffbbbb" | 31 || May 26 || Robins || 2–3 || Grimes || Wisner (0–1) || — || — || 18–13 |- bgcolor="ffbbbb" | 32 || May 28 || @ Reds || 1–6 || Ruether || Cooper (5–4) || — || — || 18–14 |- bgcolor="ffbbbb" | 33 || May 29 || @ Reds || 2–3 || Luque || Carlson (3–3) || — || — || 18–15 |- bgcolor="ffbbbb" | 34 || May 30 || @ Reds || 3–5 || Sallee || Wisner (0–2) || — || — || 18–16 |- bgcolor="ffbbbb" | 35 || May 31 || Cardinals || 4–5 || Sherdel || Ponder (3–2) || Jacobs || — || 18–17 |- bgcolor="ccffcc" | 36 || May 31 || Cardinals || 7–4 || Cooper (6–4) || Doak || Carlson (1) || — || 19–17
|- bgcolor="ffbbbb" | 37 || June 1 || Cardinals || 4–5 (15) || Haines || Ponder (3–3) || — || — || 19–18 |- bgcolor="ffbbbb" | 38 || June 2 || Cardinals || 2–6 || Schupp || Carlson (3–4) || — || — || 19–19 |- bgcolor="ccffcc" | 39 || June 6 || @ Reds || 3–1 (10) || Cooper (7–4) || Ruether || — || — || 20–19 |- bgcolor="ffbbbb" | 40 || June 9 || @ Braves || 6–7 (10) || Fillingim || Adams (5–5) || — || — || 20–20 |- bgcolor="ffbbbb" | 41 || June 10 || @ Braves || 1–2 || Scott || Cooper (7–5) || — || — || 20–21 |- bgcolor="ffbbbb" | 42 || June 11 || @ Braves || 0–3 || Fillingim || Hamilton (2–3) || — || — || 20–22 |- bgcolor="ccffcc" | 43 || June 12 || @ Phillies || 6–4 || Carlson (4–4) || Rixey || — || 4,000 || 21–22 |- bgcolor="ccffcc" | 44 || June 14 || @ Phillies || 6–1 || Cooper (8–5) || Gallia || — || — || 22–22 |- bgcolor="ccffcc" | 45 || June 15 || @ Phillies || 7–6 (10) || Ponder (4–3) || Causey || — || — || 23–22 |- bgcolor="ffbbbb" | 46 || June 18 || @ Giants || 4–5 || Barnes || Cooper (8–6) || — || 1,000 || 23–23 |- bgcolor="ccffcc" | 47 || June 19 || @ Giants || 3–0 || Adams (6–5) || Nehf || — || 15,000 || 24–23 |- bgcolor="ffbbbb" | 48 || June 20 || @ Giants || 0–8 || Douglas || Carlson (4–5) || — || 23,000 || 24–24 |- bgcolor="ccffcc" | 49 || June 22 || @ Robins || 9–7 || Cooper (9–6) || Pfeffer || — || 5,000 || 25–24 |- bgcolor="ffbbbb" | 50 || June 23 || @ Robins || 2–5 || Marquard || Carlson (4–6) || — || — || 25–25 |- bgcolor="ffbbbb" | 51 || June 24 || @ Robins || 2–6 || Mamaux || Adams (6–6) || — || 3,500 || 25–26 |- bgcolor="ccffcc" | 52 || June 25 || Cubs || 6–3 || Cooper (10–6) || Hendrix || — || — || 26–26 |- bgcolor="ccffcc" | 53 || June 26 || Cubs || 9–4 || Ponder (5–3) || Vaughn || — || — || 27–26 |- bgcolor="ccffcc" | 54 || June 27 || @ Cubs || 8–3 || Carlson (5–6) || Alexander || Cooper (1) || — || 28–26 |- bgcolor="ffbbbb" | 55 || June 28 || @ Cubs || 2–5 || Tyler || Adams (6–7) || — || — || 28–27 |- bgcolor="ffbbbb" | 56 || June 28 || @ Cubs || 4–5 || Gaw || Ponder (5–4) || — || — || 28–28 |- bgcolor="ccffcc" | 57 || June 29 || @ Cubs || 4–3 (11) || Cooper (11–6) || Martin || — || — || 29–28 |- bgcolor="ffbbbb" | 58 || June 29 || @ Cubs || 3–14 || Hendrix || Meador (0–1) || — || — || 29–29 |- bgcolor="ffbbbb" | 59 || June 30 || @ Cubs || 0–1 || Vaughn || Ponder (5–5) || — || — || 29–30
|- bgcolor="ccffcc" | 60 || July 1 || @ Cardinals || 6–2 (10) || Carlson (6–6) || Sherdel || Adams (1) || — || 30–30 |- bgcolor="ffbbbb" | 61 || July 2 || @ Cardinals || 0–3 || Doak || Hamilton (2–4) || — || — || 30–31 |- bgcolor="ccffcc" | 62 || July 3 || @ Cardinals || 3–1 || Cooper (12–6) || Goodwin || — || — || 31–31 |- bgcolor="ffbbbb" | 63 || July 4 || @ Reds || 0–5 || Ruether || Adams (6–8) || — || — || 31–32 |- bgcolor="ccffcc" | 64 || July 5 || Reds || 4–1 || Carlson (7–6) || Fisher || — || — || 32–32 |- bgcolor="ccffcc" | 65 || July 5 || Reds || 6–5 (11) || Hamilton (3–4) || Luque || — || — || 33–32 |- bgcolor="ffbbbb" | 66 || July 6 || Reds || 2–7 || Ring || Meador (0–2) || — || — || 33–33 |- bgcolor="ccffcc" | 67 || July 7 || Phillies || 2–1 || Cooper (13–6) || Smith || — || — || 34–33 |- bgcolor="ccffcc" | 68 || July 8 || Phillies || 1–0 || Adams (7–8) || Meadows || — || — || 35–33 |- bgcolor="ffbbbb" | 69 || July 9 || Phillies || 1–4 || Rixey || Carlson (7–7) || — || — || 35–34 |- bgcolor="ffbbbb" | 70 || July 10 || Phillies || 7–8 (11) || Meadows || Cooper (13–7) || — || — || 35–35 |- bgcolor="ffbbbb" | 71 || July 10 || Phillies || 1–3 || Hubbell || Ponder (5–6) || — || — || 35–36 |- bgcolor="ccffcc" | 72 || July 12 || Braves || 3–2 (11) || Adams (8–8) || Fillingim || — || — || 36–36 |- bgcolor="ccffcc" | 73 || July 13 || Braves || 5–2 || Carlson (8–7) || Scott || — || — || 37–36 |- bgcolor="ccffcc" | 74 || July 14 || Braves || 4–3 || Cooper (14–7) || Oeschger || — || — || 38–36 |- bgcolor="ccffcc" | 75 || July 15 || Braves || 9–8 || Carlson (9–7) || Watson || — || — || 39–36 |- bgcolor="ffbbbb" | 76 || July 16 || Giants || 0–7 (17) || Benton || Hamilton (3–5) || — || 4,000 || 39–37 |- bgcolor="ccffcc" | 77 || July 17 || Giants || 2–0 || Adams (9–8) || Toney || — || — || 40–37 |- bgcolor="ffbbbb" | 78 || July 17 || Giants || 2–4 || Barnes || Carlson (9–8) || — || 25,000 || 40–38 |- bgcolor="ffbbbb" | 79 || July 20 || Giants || 2–5 || Nehf || Cooper (14–8) || — || 3,000 || 40–39 |- bgcolor="ccffcc" | 80 || July 21 || Robins || 4–3 || Ponder (6–6) || Marquard || — || 3,800 || 41–39 |- bgcolor="ccffcc" | 81 || July 22 || Robins || 5–2 || Carlson (10–8) || Cadore || — || 4,000 || 42–39 |- bgcolor="ffbbbb" | 82 || July 23 || Robins || 5–6 || Smith || Adams (9–9) || — || 4,000 || 42–40 |- bgcolor="ccffcc" | 83 || July 24 || Robins || 5–1 || Cooper (15–8) || Grimes || — || 15,000 || 43–40 |- bgcolor="ccffcc" | 84 || July 25 || @ Robins || 5–4 || Ponder (7–6) || Mitchell || — || 22,000 || 44–40 |- bgcolor="ffbbbb" | 85 || July 26 || @ Robins || 4–6 || Smith || Carlson (10–9) || — || — || 44–41 |- bgcolor="ccffcc" | 86 || July 27 || @ Phillies || 7–1 || Hamilton (4–5) || Meadows || — || — || 45–41 |- bgcolor="ccffcc" | 87 || July 28 || @ Phillies || 6–3 || Cooper (16–8) || Smith || — || — || 46–41 |- bgcolor="ffbbbb" | 88 || July 28 || @ Phillies || 4–5 || Causey || Adams (9–10) || Gallia || — || 46–42 |- bgcolor="ffbbbb" | 89 || July 29 || @ Phillies || 3–7 || Rixey || Ponder (7–7) || — || — || 46–43 |- bgcolor="ffbbbb" | 90 || July 30 || @ Phillies || 2–7 || Hubbell || Carlson (10–10) || — || — || 46–44 |- bgcolor="ccffcc" | 91 || July 31 || @ Braves || 4–2 || Cooper (17–8) || Rudolph || — || — || 47–44 |- bgcolor="ffbbbb" | 92 || July 31 || @ Braves || 1–6 || Fillingim || Hamilton (4–6) || — || — || 47–45
|- bgcolor="ccffcc" | 93 || August 2 || @ Braves || 3–2 || Adams (10–10) || Oeschger || Carlson (2) || — || 48–45 |- bgcolor="ccffcc" | 94 || August 3 || @ Braves || 3–2 || Ponder (8–7) || McQuillan || — || — || 49–45 |- bgcolor="ccffcc" | 95 || August 4 || @ Braves || 3–0 || Cooper (18–8) || Fillingim || — || — || 50–45 |- bgcolor="ccffcc" | 96 || August 5 || @ Robins || 8–5 (10) || Hamilton (5–6) || Grimes || — || 7,000 || 51–45 |- bgcolor="ccffcc" | 97 || August 7 || @ Robins || 7–0 || Adams (11–10) || Smith || — || 12,000 || 52–45 |- bgcolor="ffbbbb" | 98 || August 8 || @ Robins || 1–2 || Cadore || Ponder (8–8) || — || 20,000 || 52–46 |- bgcolor="ffbbbb" | 99 || August 9 || @ Giants || 0–9 || Nehf || Cooper (18–9) || — || 12,000 || 52–47 |- bgcolor="ffbbbb" | 100 || August 11 || @ Giants || 1–5 || Benton || Hamilton (5–7) || — || — || 52–48 |- bgcolor="ffbbbb" | 101 || August 11 || @ Giants || 3–6 || Douglas || Carlson (10–11) || — || 20,000 || 52–49 |- bgcolor="ccffcc" | 102 || August 12 || @ Giants || 2–0 || Adams (12–10) || Barnes || — || 15,000 || 53–49 |- bgcolor="ffbbbb" | 103 || August 13 || Cardinals || 2–4 || Schupp || Cooper (18–10) || — || — || 53–50 |- bgcolor="ffbbbb" | 104 || August 14 || Cardinals || 0–1 || Doak || Ponder (8–9) || — || — || 53–51 |- bgcolor="ffffff" | 105 || August 14 || Cardinals || 1–1 (8) || || || — || — || 53–51 |- bgcolor="ccffcc" | 106 || August 15 || @ Cardinals || 4–2 (11) || Hamilton (6–7) || May || — || — || 54–51 |- bgcolor="ffbbbb" | 107 || August 15 || @ Cardinals || 2–3 || Kircher || Wisner (0–3) || — || — || 54–52 |- bgcolor="ccffcc" | 108 || August 16 || @ Cardinals || 3–2 || Adams (13–10) || Haines || — || — || 55–52 |- bgcolor="ccffcc" | 109 || August 17 || @ Cardinals || 10–6 || Cooper (19–10) || Schupp || Carlson (3) || — || 56–52 |- bgcolor="ffbbbb"