The 2015 Oakland Athletics season was the 48th for the franchise in Oakland (all at O.co Coliseum), as well as the 115th in club history.
Offseason
On November 28, 2014, the Athletics traded Josh Donaldson to the Toronto Blue Jays for Brett Lawrie, Kendall Graveman, Sean Nolin, and Franklin Barreto.
Regular season
American League West
American League Wild Card
Record against opponents
Season summary
Game log
|- style="background:#bfb;" | 1 || April 6 || Rangers || 8–0 || Gray (1–0) || Gallardo (0–1) || — || 36,067 || 1–0 |- style="background:#fbb;" | 2 || April 7 || Rangers || 1–3 || Lewis (1–0) || Hahn (0–1) || Feliz (1) || 15,025 || 1–1 |- style="background:#bfb;" | 3 || April 8 || Rangers || 10–0 || Kazmir (1–0) || Detwiler (0–1) || — || 19,479 || 2–1 |- style="background:#fbb;" | 4 || April 9 || Rangers || 1–10 || Martinez (1–0) || Graveman (0–1) || — || 16,045 || 2–2 |- style="background:#bfb;" | 5 || April 10 || Mariners || 12–0 || Pomeranz (1–0) || Walker (0–1) || — || 30,114 || 3–2 |- style="background:#fbb;" | 6 || April 11 || Mariners || 4–5 (11) || Olson (1–0) || Abad (0–1) || Rodney (2) || 24,355 || 3–3 |- style="background:#fbb;" | 7 || April 12 || Mariners || 7–8 (10) || Rodney (1–0) || Clippard (0–1) || Medina (1) || 32,282 || 3–4 |- style="background:#bfb;" | 8 || April 13 || @ Astros || 8–1 || Kazmir (2–0) || Feldman (0–2) || — || 19,279 || 4–4 |- style="background:#bfb;" | 9 || April 14 || @ Astros || 4–0 || Graveman (1–1) || Peacock (0–1) || — || 18,395 || 5–4 |- style="background:#fbb;" | 10 || April 15 || @ Astros || 1–6 || McHugh (2–0) || Pomeranz (1–1) || – || 19,777 || 5–5 |- style="background:#fbb;" | 11 || April 17 || @ Royals || 4–6 || Davis (2–0) || Otero (0–1) || Holland (4) || 39,228 || 5–6 |- style="background:#bfb;" | 12 || April 18 || @ Royals || 5–0 || Hahn (1–1) || Ventura (2–1) || Chavez (1) || 33,151 || 6–6 |- style="background:#fbb;" | 13 || April 19 || @ Royals || 2–4 || Morales (1–0) || O'Flaherty (0–1) || Davis (2) || 36,755 || 6–7 |- style="background:#bfb;" | 14 || April 20 || @ Angels || 6–3 || Otero (1–1) || Shoemaker (2–1) || Clippard (1) || 35,228 || 7–7 |- style="background:#fbb;" | 15 || April 21 || @ Angels || 1–14 || Santiago (2–1) || Pomeranz (1–2) || — || 32,137 || 7–8 |- style="background:#bfb;" | 16 || April 22 || @ Angels || 9–2 || Gray (2–0) || Salas (0–1) || — || 30,034 || 8–8 |- style="background:#fbb;" | 17 || April 23 || @ Angels || 0–2 || Tropeano (1–0) || Chavez (0–1) || Street (5) || 24,304 || 8–9 |- style="background:#fbb;" | 18 || April 24 || Astros || 4–5 (11) || Gregerson (1–0) || O'Flaherty (0–2) || Qualls (2) || 18,205 || 8–10 |- style="background:#fbb;" | 19 || April 25 || Astros || 3–9 || Feldman (2–2) || Graveman (1–2) || — || 24,342 || 8–11 |- style="background:#fbb;" | 20 || April 26 || Astros || 6–7 || Sipp (2–0) || Clippard (0–2) || Gregerson (4) || 22,080 || 8–12 |- style="background:#bfb;" | 21 || April 28 || Angels || 6–2 || Gray (3–0) || Weaver (0–3) || — || 17,674 || 9–12 |- style="background:#fbb;" | 22 || April 29 || Angels || 3–6 || Morin (1–0) || Cook (0–1) || Street (8) || 16,212 || 9–13 |- style="background:#fbb;" | 23 || April 30 || Angels || 5–6 || Richards (2–1) || Chavez (0–2) || Street (9) || 19,534 || 9–14 |-