|| 5–2 || Barry Lersch (3–6) || Bob Locker (9–6) || Mac Scarce (11) || see 2nd game || 66–84 |- style="background:#fbb" | 151 || September 18 (2) || @ Cubs || 2–3 || Bill Bonham (6–4) || Ken Brett (12–8) || None || 2,757 || 66–85 |- style="background:#bfb" | 152 || September 19 || Cardinals || 3–2 || Steve Carlton (12–19) || Tom Murphy (3–7) || None || 7,066 || 67–85 |- style="background:#bfb" | 153 || September 20 || Cardinals || 6–5 || Bucky Brandon (2–4) || Alan Foster (13–9) || Mac Scarce (12) || 6,155 || 68–85 |- style="background:#fbb" | 154 || September 21 || Cardinals || 3–12 || Rick Wise (14–12) || Jim Lonborg (13–14) || None || 13,158 || 68–86 |- style="background:#fbb" | 155 || September 22 || Cubs || 2–5 (10) || Bill Bonham (7–4) || Mac Scarce (1–8) || None || 22,273 || 68–87 |- style="background:#bfb" | 156 || September 23 || Cubs || 9–7 || Ken Brett (13–8) || Burt Hooton (14–15) || Ron Diorio (1) || 9,991 || 69–87 |- style="background:#bfb" | 157 || September 25 || @ Pirates || 2–1 || Steve Carlton (13–19) || Jim Rooker (9–6) || None || 13,312 || 70–87 |- style="background:#fbb" | 158 || September 26 || @ Pirates || 2–13 || Bob Moose (12–12) || Jim Lonborg (13–15) || Bob Johnson (4) || 8,991 || 70–88 |- style="background:#bfb" | 159 || September 27 || @ Pirates || 3–2 (13) || George Culver (7–5) || Chris Zachary (0–1) || Mike Wallace (1) || 11,577 || 71–88 |- style="background:#fbb" | 160 || September 28 || @ Cardinals || 0–3 || Diego Seguí (7–6) || Ken Brett (13–9) || None || 10,377 || 71–89 |- style="background:#fbb" | 161 || September 29 || @ Cardinals || 1–7 || Bob Gibson (12–10) || Steve Carlton (13–20) || Orlando Peña (7) || 16,104 || 71–90 |- style="background:#fbb" | 162 || September 30 || @ Cardinals || 1–3 || Rick Wise (16–12) || Jim Lonborg' (13–16) || None || 16,108 || 71–91 |- | style="text-align:left;" | The July 15, 1973, game was protested by the Phillies in the middle of the sixth inning. The protest was later denied. Roster Player stats Batting Starters by position Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted