Lee Tunnell (0–1) || Al Holland (4) || 20,622 || 10–6 |- style="background:#bfb" | 17 || April 27 || @ Mets || 8–3 || Bill Campbell (2–0) || Doug Sisk (1–1) || None || 18,171 || 11–6 |- style="background:#fbb" | 18 || April 28 || @ Mets || 3–4 || Ed Lynch (2–0) || Al Holland (0–2) || None || 14,292 || 11–7 |- style="background:#fbb" | 19 || April 29 || @ Mets || 2–6 || Walt Terrell (3–1) || Jerry Koosman (1–4) || Jesse Orosco (4) || 28,562 || 11–8 |- style="background:#fbb" | 20 || April 30 || Expos || 2–5 || Andy McGaffigan (1–0) || Steve Carlton (1–1) || None || 20,277 || 11–9 |- |- style="background:#bfb" | 21 || May 1 || Expos || 7–4 || Kevin Gross (1–0) || Bob James (0–2) || Al Holland (5) || 20,118 || 12–9 |- style="background:#fbb" | 22 || May 2 || Expos || 2–3 || Bob James (1–2) || John Denny (2–2) || Gary Lucas (4) || 24,922 || 12–10 |- style="background:#fbb" | 23 || May 4 || Reds || 5–9 || Frank Pastore (1–2) || Charles Hudson (3–1) || None || 25,180 || 12–11 |- style="background:#bfb" | 24 || May 5 || Reds || 11–2 || Jerry Koosman (2–4) || Bruce Berenyi (1–4) || None || 30,073 || 13–11 |- style="background:#fbb" | 25 || May 6 || Reds || 3–5 || John Franco (2–0) || Steve Carlton (1–2) || Tom Hume (3) || 34,842 || 13–12 |- style="background:#fbb" | 26 || May 7 || Braves || 6–8 || Pascual Pérez (1–0) || Marty Bystrom (0–1) || Gene Garber (2) || 17,739 || 13–13 |- style="background:#fbb" | 27 || May 8 || Braves || 2–8 || Pete Falcone (2–3) || John Denny (2–3) || None || 13,443 || 13–14 |- style="background:#fbb" | 28 || May 9 || @ Astros || 1–7 || Bob Knepper (3–4) || Charles Hudson (3–2) || None || 9,824 || 13–15 |- style="background:#fbb" | 29 || May 10 || @ Astros || 2–4 || Mike Scott (2–1) || Jerry Koosman (2–5) || Frank DiPino (4) || 11,492 || 13–16 |- style="background:#bfb" | 30 || May 11 || @ Padres || 6–4 || Al Holland (1–2) || Dave Dravecky (1–2) || None || 18,009 || 14–16 |- style="background:#bfb" | 31 || May 12 || @ Padres || 3–2 || Bill Campbell (3–0) || Andy Hawkins (3–1)