Deshaies (8–3) || Mike Jackson (1) || 20,178 || 38–40 |- style="background:#fbb" | 79 || July 5 || Astros || 2–8 || Mike Scott (10–4) || Kevin Gross (6–8) || Larry Andersen (2) || 30,179 || 38–41 |- style="background:#bfb" | 80 || July 6 || @ Reds || 9–6 || Mike Jackson (3–6) || Ted Power (6–4) || Steve Bedrosian (22) || 18,802 || 39–41 |- style="background:#bfb" | 81 || July 7 || @ Reds || 10–8 (10) || Kent Tekulve (3–3) || John Franco (5–3) || Steve Bedrosian (23) || 22,553 || 40–41 |- style="background:#bfb" | 82 || July 8 || @ Reds || 7–2 || Bruce Ruffin (6–6) || Guy Hoffman (7–3) || None || 26,082 || 41–41 |- style="background:#fbb" | 83 || July 9 || @ Braves || 6–11 || Jeff Dedmon (3–3) || Tom Hume (1–1) || None || 10,671 || 41–42 |- style="background:#bfb" | 84 || July 10 || @ Braves || 5–2 || Shane Rawley (10–5) || Doyle Alexander (4–5) || Steve Bedrosian (24) || 12,068 || 42–42 |- style="background:#fbb" | 85 || July 11 || @ Braves || 4–5 || Rick Mahler (6–9) || Don Carman (4–7) || Jim Acker (7) || 30,503 || 42–43 |- style="background:#fbb" | 86 || July 12 || @ Braves || 3–9 || Randy O'Neal (4–1) || Bruce Ruffin (6–7) || Paul Assenmacher (1) || 16,579 || 42–44 |- style="background:#bbcaff;" | – || July 14 ||colspan="7" |1987 Major League Baseball All-Star Game at Oakland–Alameda County Coliseum in Oakland |- style="background:#fbb" | 87 || July 16 || @ Astros || 1–2 || Danny Darwin (6–6) || Mike Jackson (3–7) || None || 19,614 || 42–45 |- style="background:#bfb" | 88 || July 17 || @ Astros || 2–1 || Shane Rawley (11–5) || Mike Scott (10–6) || Steve Bedrosian (25) || 32,608 || 43–45 |- style="background:#bfb" | 89 || July 18 || @ Astros || 4–2 || Don Carman (5–7) || Bob Knepper (3–11) || Steve Bedrosian (26) || 30,368 || 44–45 |- style="background:#bfb" | 90 || July 19 || @ Astros || 4–1 || Bruce Ruffin (7–7) || Nolan Ryan (4–11) || None || 25,143 || 45–45 |- style="background:#fbb" | 91 || July 20 || Reds || 6–10 (11) || John Franco (6–3) || Mike Jackson (3–8) || None || 27,347 || 45–46 |- style="background:#fbb" | 92 || July 21 || Reds || 3–4 || Bill Gullickson (10–6) ||