| 61 || June 15 || @ Cubs || 5–2 || Charles Hudson (7–4) || Chuck Rainey (5–5) || Al Holland (14) || 27,489 || 34–27 |- style="background:#bfb" | 62 || June 16 || @ Cubs || 8–2 || Marty Bystrom (3–3) || Rick Reuschel (3–3) || None || 40,723 || 35–27 |- style="background:#bfb" | 63 || June 17 || @ Cubs || 9–7 || Kevin Gross (3–2) || Dennis Eckersley (5–7) || Al Holland (15) || 36,882 || 36–27 |- style="background:#bfb" | 64 || June 19 || @ Mets || 6–4 || Jerry Koosman (7–6) || Ed Lynch (7–2) || None || 28,061 || 37–27 |- style="background:#fbb" | 65 || June 20 || @ Mets || 4–7 || Ron Darling (7–3) || Steve Carlton (4–4) || Doug Sisk (8) || 28,082 || 37–28 |- style="background:#fbb" | 66 || June 21 || @ Mets || 7–10 || Jesse Orosco (5–2) || Bill Campbell (3–2) || Doug Sisk (9) || 20,094 || 37–29 |- style="background:#fbb" | 67 || June 22 (1) || @ Pirates || 3–10 || Larry McWilliams (4–5) || Marty Bystrom (3–4) || None || see 2nd game || 37–30 |- style="background:#fbb" | 68 || June 22 (2) || @ Pirates || 6–7 (13) || Rod Scurry (1–3) || Bill Campbell (3–3) || None || 20,516 || 37–31 |- style="background:#bfb" | 69 || June 23 || @ Pirates || 7–5 || Jerry Koosman (8–6) || John Candelaria (5–6) || None || 19,014 || 38–31 |- style="background:#bfb" | 70 || June 24 || @ Pirates || 4–2 || Steve Carlton (5–4) || John Tudor (4–5) || Al Holland (16) || 17,749 || 39–31 |- style="background:#fbb" | 71 || June 25 || Mets || 5–10 || Ron Darling (8–3) || Charles Hudson (7–5) || None || 26,090 || 39–32 |- style="background:#bfb" | 72 || June 26 || Mets || 3–0 || Kevin Gross (4–2) || Walt Terrell (5–7) || Al Holland (17) || 28,347 || 40–32 |- style="background:#bfb" | 73 || June 27 || Mets || 5–1 || Marty Bystrom (4–4) || Dwight Gooden (6–5) || Larry Andersen (2) || 35,151 || 41–32 |- style="background:#fbb" | 74 || June 28 || Astros || 6–7 || Bill Dawley (5–4) || Al Holland (4–4) || None || 25,742 || 41–33 |- style="background:#bfb" | 75 || June 29 || Astros || 7–2 || Steve Carlton (6–4) || Bob Knepper (7–8) || None || 25,056