| Tuesday, January 15 |
| Future Cub Ray King is born in Chicago, IL. |
| Saturday, January 19 |
| Future Cub Amaury Telemaco is born in Higuey, D.R. |
| Friday, March 1 |
| Former Cub Larry Doyle dies in Saranac Lake, NY at the age of 88. |
| Monday, March 4 |
| Former Cub Les Sweetland dies in Melbourne, FL at the age of 73. |
| Sunday, March 24 |
| Future Cub Jamie Arnold is born in Dearborn, MI. |
| Thursday, April 4 |
| » Major-league debuts: Jim Sundberg (Rangers) |
| Friday, April 5 |
| » Major-league debuts: Robin Yount (Brewers) |
| Tuesday, April 9 |
| » Defeated Phillies (1-2), 2-0 | Wrigley Field (1-0) | 1-0 | |
| » W: Bill Bonham (1-0) L: Ron Schueler (0-1) | Second | ½ out |
| Wednesday, April 10 |
| » Defeated Phillies (1-3), 7-6 | Wrigley Field (2-0) | 2-0 | Won 2 |
| » W: Ray Burris (1-0) L: Mac Scarce (1-1) | First | -- |
| Thursday, April 11 |
| » Lost to Phillies (2-3), 4-3 | Wrigley Field (2-1) | 2-1 | |
| » W: Frank Linzy (1-0) L: Horacio Pina (0-1) S: Eddie Watt (1) | Third | ½ out |
| Saturday, April 13 |
| » Defeated Expos (2-1), 7-4 | Wrigley Field (3-1) | 3-1 | |
| » W: Ken Frailing (1-0) L: Ernie McAnally (0-1) | Third | 2 out |
| » Lost to Expos (3-1), 13-3 | Wrigley Field (3-2) | 3-2 | |
| » W: Mike Torrez (1-0) L: Bill Bonham (1-1) | Third | 2 out |
| Tuesday, April 16 |
| » Lost to Pirates (2-7), 8-5 | Wrigley Field (3-3) | 3-3 | Lost 2 |
| » W: Bruce Kison (1-1) L: Mike Paul (0-1) | Fourth | 1½ out |
| Wednesday, April 17 |
| » Defeated Pirates (2-8), 18-9 | Wrigley Field (4-3) | 4-3 | |
| » W: Burt Hooton (1-0) L: Jerry Reuss (0-1) | Fourth | 1½ out |
| Thursday, April 18 |
| » Defeated Pirates (2-9), 1-0 | Wrigley Field (5-3) | 5-3 | Won 2 |
| » W: Ken Frailing (2-0) L: Jim Rooker (0-2) S: Ray Burris (1) | Third | 1½ out |
| Friday, April 19 |
| » Lost to Phillies (8-4), 9-2 | Veteran's Stadium (0-1) | 5-4 | |
| » W: Jim Lonborg (1-1) L: Bill Bonham (1-2) | Fourth | 2½ out |
| Saturday, April 20 |
| » Defeated Phillies (8-5), 5-4 | Veteran's Stadium (1-1) | 6-4 | |
| » W: Ray Burris (2-0) L: Mac Scarce (2-2) | Fourth | 1½ out |
| Former Cub Elmer Ponder dies in Albuquerque, NM at the age of 81. |
| Sunday, April 21 |
| » Lost to Phillies (9-5), 7-3 | Veteran's Stadium (1-2) | 6-5 | |
| » W: Steve Carlton (2-0) L: Burt Hooton (1-1) | Fourth | 2½ out |
| Tuesday, April 23 |
| » Lost to Reds (8-7), 5-3 | Riverfront Stadium (0-1) | 6-6 | Lost 2 |
| » W: Roger Nelson (1-2) L: Ken Frailing (2-1) S: Pedro Borbon (2) | Fourth | 3½ out |
| Former Cub Cy Williams dies in Eagle River, WI at the age of 87. |
| Wednesday, April 24 |
| » Lost to Reds (9-7), 1-0 | Riverfront Stadium (0-2) | 6-7 | Lost 3 |
| » W: Jack Billingham (3-1) L: Bill Bonham (1-3) | Fourth | 4 out |
| Friday, April 26 |
| » Lost to Braves (10-10), 9-3 | Atlanta-Fulton County Stadium (0-1) | 6-8 | Lost 4 |
| » W: Carl Morton (2-2) L: Jim Kremmel (0-1) | Fourth | 3½ out |
| Saturday, April 27 |
| » Lost to Braves (11-10), 5-2 | Atlanta-Fulton County Stadium (0-2) | 6-9 | Lost 5 |
| » W: Roric Harrison (2-3) L: Burt Hooton (1-2) | Fourth | 3½ out |
| Sunday, April 28 |
| » Defeated Braves (11-11), 4-3 | Atlanta-Fulton County Stadium (1-2) | 7-9 | |
| » W: Horacio Pina (1-1) L: Jack Aker (0-1) | Fourth | 2½ out |
| Monday, April 29 |
| » Lost to Astros (13-10), 18-2 | Astrodome (0-1) | 7-10 | |
| » W: Dave Roberts (4-2) L: Bill Bonham (1-4) | Fourth | 3 out |
| » Major-league debuts: Jim Todd (Cubs) |
| Tuesday, April 30 |
| » Lost to Astros (14-10), 4-2 | Astrodome (0-2) | 7-11 | Lost 2 |
| » W: Ken Forsch (1-1) L: Horacio Pina (1-2) | Fourth | 4 out |
| Wednesday, May 1 |
| » Lost to Astros (15-10), 11-7 | Astrodome (0-3) | 7-12 | Lost 3 |
| » W: Don Wilson (1-1) L: Rick Reuschel (0-1) | Fourth | 4 out |
| Friday, May 3 |
| » Defeated Reds (11-10), 6-5 | Wrigley Field (6-3) | 8-12 | |
| » W: Horacio Pina (2-2) L: Don Gullett (2-2) | Fourth | 3 out |
| Saturday, May 4 |
| » Defeated Reds (11-11), 3-2 | Wrigley Field (7-3) | 9-12 | Won 2 |
| » W: Rick Reuschel (1-1) L: Fred Norman (1-2) | Fourth | 2½ out |
| Future Cub Miguel Cairo is born in Anaco, Venezuela. |
| Sunday, May 5 |
| » Lost to Reds (12-11), 5-2 | Wrigley Field (7-4) | 9-13 | |
| » W: Jack Billingham (4-1) L: Bill Bonham (1-5) S: Pedro Borbon (5) | Fourth | 3 out |
| Tuesday, May 7 |
| » Defeated Braves (13-15), 3-2 | Wrigley Field (8-4) | 10-13 | |
| » W: Steve Stone (1-0) L: Carl Morton (3-3) S: Horacio Pina (1) | Fourth | 3 out |
| Thursday, May 9 |
| » Defeated Braves (13-16), 3-1 | Wrigley Field (9-4) | 11-13 | Won 2 |
| » W: Rick Reuschel (2-1) L: Roric Harrison (2-5) | Fourth | 3 out |
| Friday, May 10 |
| » Lost to Mets (12-17), 7-2 | Wrigley Field (9-5) | 11-14 | |
| » W: Jerry Koosman (4-0) L: Burt Hooton (1-3) | Fourth | 3 out |
| Saturday, May 11 |
| » Lost to Mets (13-17), 6-3 | Wrigley Field (9-6) | 11-15 | Lost 2 |
| » W: Craig Swan (1-2) L: Ken Frailing (2-2) | Fourth | 3 out |
| Sunday, May 12 |
| » Defeated Mets (13-18), 4-3 | Wrigley Field (10-6) | 12-15 | |
| » W: Bill Bonham (2-5) L: Tom Seaver (1-4) | Fourth | 3 out |
| Tuesday, May 14 |
| » Defeated Pirates (9-20), 7-1 | Three Rivers Stadium (1-0) | 13-15 | Won 2 |
| » W: Rick Reuschel (3-1) L: Jerry Reuss (1-3) | Fourth | 2 out |
| Wednesday, May 15 |
| » Lost to Pirates (10-20), 3-2 | Three Rivers Stadium (1-1) | 13-16 | |
| » W: Bruce Kison (2-1) L: Bill Bonham (2-6) | Fourth | 3 out |
| Thursday, May 16 |
| » Lost to Pirates (11-20), 5-2 | Three Rivers Stadium (1-2) | 13-17 | Lost 2 |
| » W: Ken Brett (3-3) L: Ken Frailing (2-3) S: Bruce Kison (1) | Fifth | 3 out |
| Friday, May 17 |
| » Lost to Cardinals (18-16), 9-8 | Busch Stadium II (0-1) | 13-18 | Lost 3 |
| » W: Orlando Pena (2-0) L: Bill Bonham (2-7) | Fourth | 3½ out |
| Saturday, May 18 |
| » Lost to Cardinals (19-16), 11-2 | Busch Stadium II (0-2) | 13-19 | Lost 4 |
| » W: Sonny Siebert (3-3) L: Rick Reuschel (3-2) | Fourth | 4½ out |
| Sunday, May 19 |
| » Lost to Cardinals (20-16), 6-5 | Busch Stadium II (0-3) | 13-20 | Lost 5 |
| » W: Bob Gibson (3-3) L: Bill Bonham (2-8) S: Al Hrabosky (1) | Fifth | 5½ out |
| Monday, May 20 |
| » Defeated Mets (17-22), 2-1 | Shea Stadium (1-0) | 14-20 | |
| » W: Burt Hooton (2-3) L: Harry Parker (1-2) | Fifth | 5 out |
| Future Cub Brian McNichol is born in Fairfax, VA. |
| Tuesday, May 21 |
| » Lost to Mets (18-22), 10-5 | Shea Stadium (1-1) | 14-21 | |
| » W: George Stone (2-3) L: Ken Frailing (2-4) | Fifth | 6 out |
| Wednesday, May 22 |
| » Defeated Mets (18-23), 9-6 | Shea Stadium (2-1) | 15-21 | |
| » W: Dave LaRoche (1-0) L: Bob Apodaca (1-3) | Fifth | 6 out |
| Friday, May 24 |
| » Lost to Cardinals (21-19), 1-0 | Wrigley Field (10-7) | 15-22 | |
| » W: Sonny Siebert (4-3) L: Rick Reuschel (3-3) | Fifth | 6 out |
| Saturday, May 25 |
| » Defeated Cardinals (21-20), 5-4 | Wrigley Field (11-7) | 16-22 | |
| » W: Bill Bonham (3-8) L: Bob Gibson (3-4) S: Dave LaRoche (1) | Fifth | 6½ out |
| Sunday, May 26 |
| » Lost to Cardinals (22-20), 7-1 | Wrigley Field (11-8) | 16-23 | |
| » W: Lynn McGlothen (6-2) L: Burt Hooton (2-4) | Fifth | 6½ out |
| Monday, May 27 |
| » Defeated Giants (25-24), 12-4 | Wrigley Field (12-8) | 17-23 | |
| » W: Ken Frailing (3-4) L: Mike Caldwell (7-2) | Fifth | 5½ out |
| Wednesday, May 29 |
| » Lost to Giants (26-24), 5-4 | Wrigley Field (12-9) | 17-24 | |
| » W: John D'Acquisto (3-5) L: Rick Reuschel (3-4) S: Randy Moffitt (11) | Fifth | 5 out |
| Thursday, May 30 |
| » Defeated Giants (26-25), 5-3 | Wrigley Field (13-9) | 18-24 | |
| » W: Bill Bonham (4-8) L: Elias Sosa (5-1) | Fourth | 4½ out |
| Friday, May 31 |
| » Lost to Dodgers (36-14), 8-3 | Wrigley Field (13-10) | 18-25 | |
| » W: Doug Rau (5-1) L: Burt Hooton (2-5) S: Mike Marshall (8) | Fourth | 4½ out |
| Saturday, June 1 |
| » Lost to Dodgers (37-14), 10-0 | Wrigley Field (13-11) | 18-26 | Lost 2 |
| » W: Andy Messersmith (5-1) L: Ken Frailing (3-5) | Fifth | 5½ out |
| Sunday, June 2 |
| » Defeated Dodgers (37-15), 7-6 | Wrigley Field (14-11) | 19-26 | |
| » W: Rick Reuschel (4-4) L: Mike Marshall (2-3) S: Horacio Pina (2) | Fifth | 5½ out |
| Tuesday, June 4 |
| » Lost to Padres (19-38), 6-5 | San Diego/Jack Murphy Stadium (0-1) | 19-27 | |
| » W: Larry Hardy (4-2) L: Dave LaRoche (1-1) S: Vicente Romo (6) | Fourth | 6 out |
| Wednesday, June 5 |
| » Lost to Padres (20-38), 4-3 | San Diego/Jack Murphy Stadium (0-2) | 19-28 | Lost 2 |
| » W: Vicente Romo (2-2) L: Ray Burris (2-1) | Fifth | 7 out |
| Thursday, June 6 |
| » Defeated Padres (20-39), 5-1 | San Diego/Jack Murphy Stadium (1-2) | 20-28 | |
| » W: Ken Frailing (4-5) L: Randy Jones (3-10) | Fifth | 6½ out |
| Friday, June 7 |
| » Lost to Dodgers (41-15), 6-5 | Dodger Stadium (0-1) | 20-29 | |
| » W: Mike Marshall (4-3) L: Dave LaRoche (1-2) | Fifth | 6½ out |
| Saturday, June 8 |
| » Defeated Dodgers (41-16), 6-5 | Dodger Stadium (1-1) | 21-29 | |
| » W: Horacio Pina (3-2) L: Jim Brewer (4-3) | Fifth | 6½ out |
| Sunday, June 9 |
| » Lost to Dodgers (42-16), 4-3 | Dodger Stadium (1-2) | 21-30 | |
| » W: Charlie Hough (6-1) L: Horacio Pina (3-3) | Fifth | 6½ out |
| Tuesday, June 11 |
| » Defeated Giants (30-31), 7-4 | Candlestick Park (1-0) | 22-30 | |
| » W: Ken Frailing (5-5) L: John D'Acquisto (4-6) S: Horacio Pina (3) | Fourth | 6 out |
| Wednesday, June 12 |
| » Defeated Giants (30-32), 10-1 | Candlestick Park (2-0) | 23-30 | Won 2 |
| » W: Rick Reuschel (5-4) L: Tom Bradley (6-6) | Fourth | 6 out |
| Thursday, June 13 |
| » Lost to Giants (31-32), 1-0 | Candlestick Park (2-1) | 23-31 | |
| » W: Jim Barr (3-3) L: Bill Bonham (4-9) | Fourth | 6½ out |
| Friday, June 14 |
| » Defeated Astros (31-31), 10-7 | Wrigley Field (15-11) | 24-31 | |
| » W: Jim Todd (1-0) L: Dave Roberts (5-7) | Fourth | 5½ out |
| » Major-league debuts: Steve Swisher (Cubs) |
| Saturday, June 15 |
| » Lost to Astros (32-31), 8-7 | Wrigley Field (15-12) | 24-32 | |
| » W: Fred Scherman (1-3) L: Horacio Pina (3-4) S: Dave Roberts (1) | Fourth | 6½ out |
| Sunday, June 16 |
| » Defeated Astros (32-32), 2-1 | Wrigley Field (16-12) | 25-32 | |
| » W: Burt Hooton (3-5) L: Ken Forsch (3-2) | Fourth | 5½ out |
| Monday, June 17 |
| » Lost to Padres (27-42), 7-5 | Wrigley Field (16-13) | 25-33 | |
| » W: Larry Hardy (6-2) L: Steve Stone (1-1) | Fourth | 6½ out |
| Tuesday, June 18 |
| » Lost to Padres (28-42), 9-4 | Wrigley Field (16-14) | 25-34 | Lost 2 |
| » W: Dave Freisleben (6-2) L: Bill Bonham (4-10) | Fifth | 6½ out |
| » Major-league debuts: Oscar Zamora (Cubs) |
| Wednesday, June 19 |
| » Lost to Padres (29-42), 1-0 | Wrigley Field (16-15) | 25-35 | Lost 3 |
| » W: Dan Spillner (3-1) L: Jim Todd (1-1) | Fifth | 7½ out |
| Thursday, June 20 |
| » Defeated Pirates (27-35), 3-0 | Wrigley Field (17-15) | 26-35 | |
| » W: Rick Reuschel (6-4) L: Dock Ellis (3-6) | Fifth | 6½ out |
| Friday, June 21 |
| » Defeated Pirates (27-36), 3-2 | Wrigley Field (18-15) | 27-35 | Won 2 |
| » W: Steve Stone (2-1) L: Jim Rooker (3-6) S: Oscar Zamora (1) | Fourth | 5½ out |
| Saturday, June 22 |
| » Lost to Pirates (28-36), 6-0 | Wrigley Field (18-16) | 27-36 | |
| » W: Ken Brett (9-4) L: Ken Frailing (5-6) | Fifth | 7 out |
| Sunday, June 23 |
| » Defeated Pirates (28-37), 7-3 | Wrigley Field (19-16) | 28-36 | |
| » W: Bill Bonham (5-10) L: Dave Giusti (2-3) | Fourth | 6½ out |
| Monday, June 24 |
| » Lost to Mets (27-41), 4-2 | Wrigley Field (19-17) | 28-37 | |
| » W: Bob Miller (2-1) L: Oscar Zamora (0-1) | Fourth | 7½ out |
| Tuesday, June 25 |
| » Lost to Mets (28-41), 5-1 | Wrigley Field (19-18) | 28-38 | Lost 2 |
| » W: Jerry Koosman (8-4) L: Rick Reuschel (6-5) | Fourth | 7½ out |
| Wednesday, June 26 |
| » Lost to Mets (29-41), 5-4 | Wrigley Field (19-19) | 28-39 | Lost 3 |
| » W: Jack Aker (1-1) L: Burt Hooton (3-6) | Fifth | 7½ out |
| Thursday, June 27 |
| » Defeated Expos (33-32), 5-4 | Parc Jarry (1-0) | 29-39 | |
| » W: Bill Bonham (6-10) L: Ernie McAnally (5-7) S: Oscar Zamora (2) | Fourth | 7½ out |
| Friday, June 28 |
| » Defeated Expos (33-33), 8-7 | Parc Jarry (2-0) | 30-39 | Won 2 |
| » W: Ray Burris (3-1) L: Ernie McAnally (5-8) S: Bill Bonham (1) | Fourth | 7½ out |
| » Lost to Expos (34-33), 15-0 | Parc Jarry (2-1) | 30-40 | |
| » W: Dennis Blair (2-1) L: Ken Frailing (5-7) | Fourth | 7½ out |
| Saturday, June 29 |
| » Defeated Expos (34-34), 2-1 | Parc Jarry (3-1) | 31-40 | |
| » W: Rick Reuschel (7-5) L: Steve Renko (5-8) | Fourth | 6½ out |
| Sunday, June 30 |
| » Lost to Expos (35-34), 10-2 | Parc Jarry (3-2) | 31-41 | |
| » W: Steve Rogers (9-8) L: Steve Stone (2-2) | Fifth | 8 out |
| Monday, July 1 |
| » Lost to Expos (36-34), 10-4 | Parc Jarry (3-3) | 31-42 | Lost 2 |
| » W: Ernie McAnally (6-8) L: Bill Bonham (6-11) | Fifth | 8½ out |
| Tuesday, July 2 |
| » Defeated Cardinals (40-35), 4-3 | Busch Stadium II (1-3) | 32-42 | |
| » W: Jim Todd (2-1) L: Sonny Siebert (7-6) S: Oscar Zamora (3) | Fifth | 7½ out |
| Wednesday, July 3 |
| » Lost to Cardinals (41-35), 5-0 | Busch Stadium II (1-4) | 32-43 | |
| » W: Lynn McGlothen (12-3) L: Rick Reuschel (7-6) | Fifth | 8½ out |
| Thursday, July 4 |
| » Defeated Cardinals (41-36), 3-2 | Busch Stadium II (2-4) | 33-43 | |
| » W: Steve Stone (3-2) L: Jack Curtis (4-9) S: Oscar Zamora (4) | Fifth | 7½ out |
| Friday, July 5 |
| » Defeated Braves (43-39), 4-1 | Wrigley Field (20-19) | 34-43 | Won 2 |
| » W: Bill Bonham (7-11) L: Carl Morton (10-7) | Fifth | 7 out |
| » Defeated Braves (43-40), 3-2 | Wrigley Field (21-19) | 35-43 | Won 3 |
| » W: Oscar Zamora (1-1) L: Max Leon (0-2) | Fifth | 7 out |
| Saturday, July 6 |
| » Lost to Braves (44-40), 3-2 | Wrigley Field (21-20) | 35-44 | |
| » W: Lew Krausse (2-2) L: Oscar Zamora (1-2) S: Danny Frisella (6) | Fifth | 8 out |
| Sunday, July 7 |
| » Defeated Braves (44-41), 4-3 | Wrigley Field (22-20) | 36-44 | |
| » W: Rick Reuschel (8-6) L: Buzz Capra (9-3) S: Horacio Pina (4) | Fifth | 6½ out |
| Tuesday, July 9 |
| » Lost to Reds (48-36), 8-5 | Wrigley Field (22-21) | 36-45 | |
| » W: Jack Billingham (9-6) L: Steve Stone (3-3) S: Pedro Borbon (10) | Fifth | 6 out |
| Wednesday, July 10 |
| » Defeated Reds (48-37), 11-3 | Wrigley Field (23-21) | 37-45 | |
| » W: Bill Bonham (8-11) L: Fred Norman (8-8) S: Oscar Zamora (5) | Fourth | 5 out |
| Thursday, July 11 |
| » Lost to Reds (49-37), 4-3 | Wrigley Field (23-22) | 37-46 | |
| » W: Pedro Borbon (7-5) L: Burt Hooton (3-7) | Fifth | 5½ out |
| Friday, July 12 |
| » Lost to Astros (47-41), 9-4 | Astrodome (0-4) | 37-47 | Lost 2 |
| » W: Don Wilson (6-6) L: Rick Reuschel (8-7) | Third | 6 out |
| Saturday, July 13 |
| » Lost to Astros (48-41), 4-0 | Astrodome (0-5) | 37-48 | Lost 3 |
| » W: Claude Osteen (8-7) L: Ray Burris (3-2) | Third | 6 out |
| Sunday, July 14 |
| » Lost to Astros (49-41), 7-6 | Astrodome (0-6) | 37-49 | Lost 4 |
| » W: Jim York (1-1) L: Oscar Zamora (1-3) | Fifth | 7½ out |
| Monday, July 15 |
| » Defeated Braves (49-44), 7-3 | Atlanta-Fulton County Stadium (2-2) | 38-49 | |
| » W: Oscar Zamora (2-3) L: Joe Niekro (1-2) | Fifth | 7 out |
| Former Cub Claud Derrick dies in Clayton, GA at the age of 89. |
| Tuesday, July 16 |
| » Defeated Braves (49-45), 7-2 | Atlanta-Fulton County Stadium (3-2) | 39-49 | Won 2 |
| » W: Rick Reuschel (9-7) L: Roric Harrison (6-11) | Fifth | 6 out |
| Wednesday, July 17 |
| » Lost to Braves (50-45), 7-2 | Atlanta-Fulton County Stadium (3-3) | 39-50 | |
| » W: Buzz Capra (10-4) L: Ray Burris (3-3) | Fifth | 6 out |
| Former Cub Dizzy Dean dies in Reno, NV at the age of 65. |
| Thursday, July 18 |
| » Defeated Reds (56-39), 3-2 | Riverfront Stadium (1-2) | 40-50 | |
| » W: Bill Bonham (9-11) L: Fred Norman (9-9) S: Oscar Zamora (6) | Fifth | 6 out |
| Friday, July 19 |
| » Lost to Reds (57-39), 4-1 | Riverfront Stadium (1-3) | 40-51 | |
| » W: Jack Billingham (10-7) L: Dave LaRoche (1-3) S: Pedro Borbon (13) | Fifth | 6 out |
| Saturday, July 20 |
| » Defeated Reds (57-40), 11-6 | Riverfront Stadium (2-3) | 41-51 | |
| » W: Oscar Zamora (3-3) L: Clay Carroll (5-3) | Fifth | 6 out |
| Sunday, July 21 |
| » Lost to Reds (58-40), 8-2 | Riverfront Stadium (2-4) | 41-52 | |
| » W: Don Gullett (12-6) L: Burt Hooton (3-8) | Fifth | 7 out |
| Thursday, July 25 |
| » Lost to Phillies (50-46), 10-2 | Wrigley Field (23-23) | 41-53 | Lost 2 |
| » Manager: Jim Marshall |
| » W: Steve Carlton (12-7) L: Burt Hooton (3-9) | Fifth | 8 out |
| Friday, July 26 |
| » Defeated Phillies (50-47), 10-7 | Wrigley Field (24-23) | 42-53 | |
| » W: Rick Reuschel (10-7) L: Jim Lonborg (12-10) | Fifth | 7 out |
| Saturday, July 27 |
| » Lost to Cardinals (49-50), 3-2 | Wrigley Field (24-24) | 42-54 | |
| » W: Bob Forsch (3-2) L: Bill Bonham (9-12) | Fifth | 8½ out |
| Sunday, July 28 |
| » Lost to Cardinals (50-50), 5-4 | Wrigley Field (24-25) | 42-55 | Lost 2 |
| » W: Al Hrabosky (4-1) L: Ken Frailing (5-8) S: Mike Garman (4) | Sixth | 8½ out |
| Monday, July 29 |
| » Lost to Cardinals (51-50), 11-4 | Wrigley Field (24-26) | 42-56 | Lost 3 |
| » W: Jack Curtis (5-10) L: Burt Hooton (3-10) | Sixth | 9½ out |
| Tuesday, July 30 |
| » Lost to Expos (47-53), 4-3 | Wrigley Field (24-27) | 42-57 | Lost 4 |
| » W: John Montague (3-3) L: Rick Reuschel (10-8) | Sixth | 9½ out |
| Wednesday, July 31 |
| » Lost to Expos (48-53), 7-4 | Wrigley Field (24-28) | 42-58 | Lost 5 |
| » W: Chuck Taylor (4-1) L: Bill Bonham (9-13) | Fifth | 10 out |
| » Lost to Expos (49-53), 4-0 | Wrigley Field (24-29) | 42-59 | Lost 6 |
| » W: Dennis Blair (6-3) L: Herb Hutson (0-1) | Fifth | 10 out |
| Thursday, August 1 |
| » Defeated Mets (45-57), 7-4 | Shea Stadium (3-1) | 43-59 | |
| » W: Burt Hooton (4-10) L: Tug McGraw (1-5) | Fifth | 9½ out |
| » Defeated Mets (45-58), 3-1 | Shea Stadium (4-1) | 44-59 | Won 2 |
| » W: Dave LaRoche (2-3) L: Ray Sadecki (4-5) S: Oscar Zamora (7) | Fifth | 9½ out |
| Saturday, August 3 |
| » Defeated Pirates (51-56), 4-3 | Three Rivers Stadium (2-2) | 45-59 | Won 3 |
| » W: Rick Reuschel (11-8) L: Jerry Reuss (10-9) S: Dave LaRoche (2) | Sixth | 9 out |
| Sunday, August 4 |
| » Defeated Pirates (51-57), 4-3 | Three Rivers Stadium (3-2) | 46-59 | Won 4 |
| » W: Bill Bonham (10-13) L: Jim Rooker (7-9) | Sixth | 9 out |
| » Lost to Pirates (52-57), 7-1 | Three Rivers Stadium (3-3) | 46-60 | |
| » W: Bruce Kison (6-6) L: Herb Hutson (0-2) | Sixth | 9 out |
| Tuesday, August 6 |
| » Lost to Phillies (56-54), 8-3 | Veteran's Stadium (1-3) | 46-61 | Lost 2 |
| » W: Steve Carlton (14-7) L: Jim Todd (2-2) | Sixth | 11 out |
| Wednesday, August 7 |
| » Lost to Phillies (57-54), 3-2 | Veteran's Stadium (1-4) | 46-62 | Lost 3 |
| » W: Gene Garber (2-2) L: Oscar Zamora (3-4) | Sixth | 11 out |
| Thursday, August 8 |
| » Lost to Phillies (58-54), 2-1 | Veteran's Stadium (1-5) | 46-63 | Lost 4 |
| » W: Ron Schueler (7-11) L: Bill Bonham (10-14) S: Gene Garber (2) | Sixth | 11 out |
| Former Cub Howie Pollet dies in Houston, TX at the age of 54. |
| Friday, August 9 |
| » Lost to Giants (51-63), 3-0 | Wrigley Field (24-30) | 46-64 | Lost 5 |
| » W: Jim Barr (10-5) L: Steve Stone (3-4) | Sixth | 12 out |
| Sunday, August 11 |
| » Lost to Giants (52-63), 5-3 | Wrigley Field (24-31) | 46-65 | Lost 6 |
| » W: Mike Caldwell (11-3) L: Rick Reuschel (11-9) | Sixth | 12 out |
| » Lost to Giants (53-63), 6-4 | Wrigley Field (24-32) | 46-66 | Lost 7 |
| » W: Elias Sosa (7-5) L: Oscar Zamora (3-5) | Sixth | 12 out |
| » Major-league debuts: Rob Sperring (Cubs) |
| Tuesday, August 13 |
| » Lost to Astros (59-56), 3-1 | Wrigley Field (24-33) | 46-67 | Lost 8 |
| » W: Dave Roberts (7-10) L: Bill Bonham (10-15) | Sixth | 12½ out |
| Wednesday, August 14 |
| » Defeated Astros (59-57), 6-5 | Wrigley Field (25-33) | 47-67 | |
| » W: Steve Stone (4-4) L: Don Wilson (8-10) S: Jim Todd (1) | Sixth | 12½ out |
| Thursday, August 15 |
| » Defeated Astros (59-58), 5-3 | Wrigley Field (26-33) | 48-67 | Won 2 |
| » W: Jim Todd (3-2) L: Ken Forsch (4-4) | Sixth | 12 out |
| Future Cub Ramon Morel is born in Villa Gonzalez, D.R. |
| Friday, August 16 |
| » Defeated Padres (47-73), 4-1 | Wrigley Field (27-33) | 49-67 | Won 3 |
| » W: Tom Dettore (1-0) L: Dave Freisleben (8-7) S: Jim Todd (2) | Sixth | 12 out |
| Saturday, August 17 |
| » Lost to Padres (48-73), 4-3 | Wrigley Field (27-34) | 49-68 | |
| » W: Larry Hardy (7-2) L: Oscar Zamora (3-6) | Fifth | 13 out |
| Sunday, August 18 |
| » Defeated Padres (48-74), 14-6 | Wrigley Field (28-34) | 50-68 | |
| » W: Steve Stone (5-4) L: Bill Greif (6-14) | Fifth | 13 out |
| Monday, August 19 |
| » Lost to Dodgers (76-46), 8-7 | Wrigley Field (28-35) | 50-69 | |
| » W: Mike Marshall (12-8) L: Oscar Zamora (3-7) | Fifth | 13 out |
| Tuesday, August 20 |
| » Lost to Dodgers (77-46), 18-8 | Wrigley Field (28-36) | 50-70 | Lost 2 |
| » W: Don Sutton (11-9) L: Tom Dettore (1-1) | Fifth | 13 out |
| Wednesday, August 21 |
| » Lost to Dodgers (78-46), 7-5 | Wrigley Field (28-37) | 50-71 | Lost 3 |
| » W: Andy Messersmith (14-5) L: Bill Bonham (10-16) S: Mike Marshall (18) | Fifth | 13 out |
| Friday, August 23 |
| » Defeated Giants (56-70), 1-0 | Candlestick Park (3-1) | 51-71 | |
| » W: Rick Reuschel (12-9) L: Jim Barr (10-7) | Sixth | 13 out |
| Future Cub Mark Bellhorn is born in Boston, MA. |
| Saturday, August 24 |
| » Defeated Giants (56-71), 2-1 | Candlestick Park (4-1) | 52-71 | Won 2 |
| » W: Steve Stone (6-4) L: Ron Bryant (3-13) S: Burt Hooton (1) | Sixth | 12 out |
| Sunday, August 25 |
| » Lost to Giants (57-71), 4-3 | Candlestick Park (4-2) | 52-72 | |
| » W: Elias Sosa (9-5) L: Oscar Zamora (3-8) | Sixth | 12½ out |
| Future Cub Gary Matthews, Jr. is born in San Francisco, CA. |
| Tuesday, August 27 |
| » Lost to Dodgers (81-47), 12-5 | Dodger Stadium (1-3) | 52-73 | Lost 2 |
| » W: Charlie Hough (7-3) L: Rick Reuschel (12-10) | Sixth | 13½ out |
| Wednesday, August 28 |
| » Lost to Dodgers (82-47), 7-6 | Dodger Stadium (1-4) | 52-74 | Lost 3 |
| » W: Mike Marshall (13-9) L: Oscar Zamora (3-9) | Sixth | 14½ out |
| Thursday, August 29 |
| » Lost to Dodgers (83-47), 3-1 | Dodger Stadium (1-5) | 52-75 | Lost 4 |
| » W: Andy Messersmith (16-5) L: Bill Bonham (10-17) | Sixth | 14½ out |
| Friday, August 30 |
| » Defeated Padres (50-82), 5-1 | San Diego/Jack Murphy Stadium (2-2) | 53-75 | |
| » W: Ken Frailing (6-8) L: Dave Freisleben (9-9) | Sixth | 14 out |
| » Defeated Padres (50-83), 4-3 | San Diego/Jack Murphy Stadium (3-2) | 54-75 | Won 2 |
| » W: Dave LaRoche (3-3) L: Mike Johnson (0-2) S: Jim Todd (3) | Sixth | 14 out |
| Sunday, September 1 |
| » Defeated Padres (50-84), 4-1 | San Diego/Jack Murphy Stadium (4-2) | 55-75 | Won 3 |
| » W: Rick Reuschel (13-10) L: Dan Spillner (6-9) S: Oscar Zamora (8) | Sixth | 13½ out |
| Tuesday, September 3 |
| » Lost to Mets (61-71), 2-0 | Wrigley Field (28-38) | 55-76 | |
| » W: Jon Matlack (12-10) L: Bill Bonham (10-18) | Sixth | 16 out |
| » Lost to Mets (62-71), 11-4 | Wrigley Field (28-39) | 55-77 | Lost 2 |
| » W: Tom Seaver (9-8) L: Tom Dettore (1-2) | Sixth | 16 out |
| Wednesday, September 4 |
| » Lost to Mets (63-71), 4-2 | Wrigley Field (28-40) | 55-78 | Lost 3 |
| » W: Ray Sadecki (7-7) L: Steve Stone (6-5) S: Bob Apodaca (3) | Sixth | 16½ out |
| Thursday, September 5 |
| » Lost to Phillies (67-70), 6-5 | Wrigley Field (28-41) | 55-79 | Lost 4 |
| » W: Ron Schueler (9-14) L: Dave LaRoche (3-4) S: Larry Christenson (1) | Sixth | 17 out |
| Friday, September 6 |
| » Lost to Phillies (68-70), 4-3 | Wrigley Field (28-42) | 55-80 | Lost 5 |
| » W: Dick Ruthven (8-11) L: Burt Hooton (4-11) | Sixth | 18 out |
| Saturday, September 7 |
| » Defeated Phillies (68-71), 3-0 | Wrigley Field (29-42) | 56-80 | |
| » W: Bill Bonham (11-18) L: Steve Carlton (14-11) | Sixth | 18 out |
| » Major-league debuts: Jerry Martin (Phillies) |
| Sunday, September 8 |
| » Lost to Phillies (69-71), 11-10 | Wrigley Field (29-43) | 56-81 | |
| » W: Gene Garber (3-2) L: Tom Dettore (1-3) | Sixth | 19 out |
| Monday, September 9 |
| » Defeated Pirates (76-64), 9-4 | Wrigley Field (30-43) | 57-81 | |
| » W: Steve Stone (7-5) L: Larry Demery (6-5) S: Dave LaRoche (3) | Sixth | 18 out |
| Tuesday, September 10 |
| » Lost to Pirates (77-64), 12-4 | Wrigley Field (30-44) | 57-82 | |
| » W: Ken Brett (13-7) L: Rick Reuschel (13-11) | Sixth | 19 out |
| Wednesday, September 11 |
| » Lost to Expos (63-77), 6-1 | Parc Jarry (3-4) | 57-83 | Lost 2 |
| » W: Steve Renko (10-14) L: Bill Bonham (11-19) S: Dale Murray (2) | Sixth | 19½ out |
| » Lost to Expos (64-77), 13-4 | Parc Jarry (3-5) | 57-84 | Lost 3 |
| » W: Tom Walker (3-5) L: Ray Burris (3-4) S: Chuck Taylor (11) | Sixth | 19½ out |
| Thursday, September 12 |
| » Lost to Expos (65-77), 2-1 | Parc Jarry (3-6) | 57-85 | Lost 4 |
| » W: Mike Torrez (12-8) L: Tom Dettore (1-4) S: Dale Murray (3) | Sixth | 19½ out |
| Friday, September 13 |
| » Lost to Mets (66-76), 6-0 | Shea Stadium (4-2) | 57-86 | Lost 5 |
| » W: Tom Seaver (11-8) L: Rick Reuschel (13-12) | Fifth | 19 out |
| » Defeated Mets (66-77), 4-3 | Shea Stadium (5-2) | 58-86 | |
| » W: Jim Todd (4-2) L: Bob Apodaca (5-6) | Fifth | 19 out |
| » Major-league debuts: Nino Espinosa (Mets) |
| Saturday, September 14 |
| » Defeated Mets (66-78), 12-0 | Shea Stadium (6-2) | 59-86 | Won 2 |
| » W: Burt Hooton (5-11) L: Ray Sadecki (8-8) | Sixth | 18½ out |
| Sunday, September 15 |
| » Defeated Mets (66-79), 5-4 | Shea Stadium (7-2) | 60-86 | Won 3 |
| » W: Dave LaRoche (4-4) L: Tug McGraw (6-9) S: Oscar Zamora (9) | Sixth | 18½ out |
| Monday, September 16 |
| » Major-league debuts: Gary Carter and Jerry White (Expos) |
| Tuesday, September 17 |
| » Defeated Phillies (73-75), 4-2 | Veteran's Stadium (2-5) | 61-86 | Won 4 |
| » W: Tom Dettore (2-4) L: Wayne Twitchell (6-9) S: Dave LaRoche (4) | Sixth | 18½ out |
| Wednesday, September 18 |
| » Defeated Phillies (73-76), 5-2 | Veteran's Stadium (3-5) | 62-86 | Won 5 |
| » W: Steve Stone (8-5) L: Jim Lonborg (15-12) S: Ken Frailing (1) | Sixth | 17½ out |
| Thursday, September 19 |
| » Defeated Phillies (73-77), 7-4 | Veteran's Stadium (4-5) | 63-86 | Won 6 |
| » W: Burt Hooton (6-11) L: Ron Schueler (10-15) S: Dave LaRoche (5) | Sixth | |
