| | | Tuesday, September 9th, 1975 | | Placed 3B Pete Rose on the active roster. | | Activated 3B Pete Rose from the disabled list. |
| Wednesday, July 30th, 1975 | | Signed C Thurmon Munson to a 4-year contract extension worth a total of $16,000,000. |
| Monday, July 21st, 1975 | | Signed 3B Darrell Evans to a 4-year contract extension worth a total of $13,560,000. |
| Sunday, July 20th, 1975 | | Signed 3B Pete Rose to a 2-year contract extension worth a total of $3,400,000. | | Signed SP Bob Moose to a 4-year contract extension worth a total of $26,800,000. | | Signed SP Mike Hedlund to a 3-year contract extension worth a total of $12,000,000. |
| Friday, November 1st, 1974 | | MR T. Forster received a 1-year contract through automatic renewal worth a total of $1,500,000. | | MR V. Romo received a 1-year contract through automatic renewal worth a total of $750,000. | | MR D. Hood received a 1-year contract through automatic renewal worth a total of $2,000,000. | | 1B J. Mayberry received a 1-year contract through automatic renewal worth a total of $1,500,000. | | SS M. Belanger received a 1-year contract through automatic renewal worth a total of $750,000. | | SS M. Phillips received a 1-year contract through automatic renewal worth a total of $500,000. | | SP L. McGlothen received a 1-year contract through automatic renewal worth a total of $350,000. | | SP V. Albury received a 1-year contract through automatic renewal worth a total of $350,000. | | SP D. Alexander received a 1-year contract through automatic renewal worth a total of $350,000. | | MR B. Lersch received a 1-year contract through automatic renewal worth a total of $750,000. | | CF G. Foster received a 1-year contract through automatic renewal worth a total of $2,100,000. | | 2B L. Randle received a 1-year contract through automatic renewal worth a total of $500,000. | | RF R. Zisk received a 1-year contract through automatic renewal worth a total of $750,000. | | C S. Yeager received a 1-year contract through automatic renewal worth a total of $350,000. | | CF L. Hisle received a 1-year contract through automatic renewal worth a total of $1,200,000. |
| Tuesday, October 29th, 1974 | | SP M. Hedlund received a 1-year contract through arbitration worth a total of $2,507,500. | | C T. Munson received a 1-year contract through arbitration worth a total of $4,388,500. | | SP B. Moose received a 1-year contract through arbitration worth a total of $5,619,600. | | 3B D. Evans received a 1-year contract through arbitration worth a total of $5,000,000. | | 1B L. May received a 1-year contract through arbitration worth a total of $2,499,000. | | 2B M. Andrews received a 1-year contract through arbitration worth a total of $600,000. |
| Tuesday, July 16th, 1974 | | Placed SP B. Moose on the 60-day disabled list. | | Purchased the contract of SP D. Alexander from Triple A Seattle. |
| Thursday, July 4th, 1974 | | Placed RF R. Zisk on the 15-day disabled list. | | Purchased the contract of CF R. LeFlore from Triple A Seattle. |
| Saturday, June 1st, 1974 | | Demoted MR K. Forsch to Triple A Seattle. | | Placed MR D. Hood on the active roster. | | Activated MR D. Hood from the disabled list. |
| Tuesday, April 16th, 1974 | | Placed MR D. Hood on the 15-day disabled list. | | Purchased the contract of MR V. Romo from Triple A Seattle. |
| Monday, February 25th, 1974 | | Signed free agent MR C. Carroll to a 1-year contract worth a total of $400,000. |
| Sunday, February 24th, 1974 | | Signed free agent MR J. Aker to a 1-year contract worth a total of $450,000. |
| Saturday, February 23rd, 1974 | | Signed free agent C B. Foote to a 1-year contract worth a total of $350,000. |
| Friday, February 15th, 1974 | | Signed free agent SP J. Koosman to a 3-year contract worth a total of $5,664,000. |
| Tuesday, February 12th, 1974 | | Signed free agent MR J. Hiller to a 2-year contract worth a total of $4,444,000. |
| Sunday, February 3rd, 1974 | | Signed free agent LF T. Paciorek to a 1-year contract worth a total of $375,000. |
| Monday, November 5th, 1973 | | C T. Munson received a 1-year contract through automatic renewal worth a total of $2,300,000. | | MR T. Forster received a 1-year contract through automatic renewal worth a total of $1,500,000. | | MR V. Romo received a 1-year contract through automatic renewal worth a total of $750,000. | | MR D. Hood received a 1-year contract through automatic renewal worth a total of $2,000,000. | | 1B J. Mayberry received a 1-year contract through automatic renewal worth a total of $1,500,000. | | SS M. Belanger received a 1-year contract through automatic renewal worth a total of $750,000. | | SP L. McGlothen received a 1-year contract through automatic renewal worth a total of $300,000. | | SP V. Albury received a 1-year contract through automatic renewal worth a total of $300,000. | | MR B. Lersch received a 1-year contract through automatic renewal worth a total of $750,000. | | MR T. Buskey received a 1-year contract through automatic renewal worth a total of $300,000. | | 3B D. Evans received a 1-year contract through automatic renewal worth a total of $2,000,000. | | CF G. Foster received a 1-year contract through automatic renewal worth a total of $2,100,000. | | 2B L. Randle received a 1-year contract through automatic renewal worth a total of $500,000. | | 1B L. May received a 1-year contract through automatic renewal worth a total of $750,000. | | RF R. Zisk received a 1-year contract through automatic renewal worth a total of $750,000. | | MR K. Forsch received a 1-year contract through automatic renewal worth a total of $750,000. | | MR C. Zachary received a 1-year contract through automatic renewal worth a total of $300,000. | | C S. Yeager received a 1-year contract through automatic renewal worth a total of $300,000. | | RF J. Burroughs received a 1-year contract through automatic renewal worth a total of $300,000. | | SS M. Kelleher received a 1-year contract through automatic renewal worth a total of $300,000. | | RF J. Lahoud received a 1-year contract through automatic renewal worth a total of $300,000. | | CF L. Hisle received a 1-year contract through automatic renewal worth a total of $1,200,000. |
| Friday, November 2nd, 1973 | | SP B. Moose received a 1-year contract through arbitration worth a total of $5,000,000. | | CF R. Monday becomes a free-agent. | | MR P. Lindblad received a 1-year contract through arbitration worth a total of $900,000. |
| Wednesday, August 1st, 1973 | | Placed 1B J. Mayberry on the 15-day disabled list. | | Placed 3B P. Rose on the active roster. | | Activated 3B P. Rose from the disabled list. |
| Tuesday, July 17th, 1973 | | Signed SP F. Jenkins to a 3-year contract extension worth a total of $15,600,000. |
| Tuesday, February 6th, 1973 | | Signed free agent CF J. Wynn to a 3-year contract worth a total of $4,290,000. | | Signed free agent MR C. Taylor to a 3-year contract worth a total of $1,470,000. |
| Thursday, February 1st, 1973 | | Released SP R. Nelson. |
| Sunday, November 5th, 1972 | | SP M. Hedlund received a 1-year contract through automatic renewal worth a total of $1,500,000. | | C T. Munson received a 1-year contract through automatic renewal worth a total of $2,300,000. | | CL B. Moore received a 1-year contract through automatic renewal worth a total of $300,000. | | 1B M. Jorgensen received a 1-year contract through automatic renewal worth a total of $300,000. | | 1B J. Mayberry received a 1-year contract through automatic renewal worth a total of $1,500,000. | | SS M. Belanger received a 1-year contract through automatic renewal worth a total of $750,000. | | SP D. Bosman received a 1-year contract through automatic renewal worth a total of $1,500,000. | | C R. Hundley received a 1-year contract through automatic renewal worth a total of $300,000. | | SS T. Foli received a 1-year contract through automatic renewal worth a total of $300,000. | | MR B. Lersch received a 1-year contract through automatic renewal worth a total of $750,000. | | SS M. Kelleher received a 1-year contract through automatic renewal worth a total of $300,000. | | CF R. Monday received a 1-year contract through automatic renewal worth a total of $1,000,000. | | 3B D. Evans received a 1-year contract through automatic renewal worth a total of $2,000,000. | | SP R. Nelson received a 1-year contract through automatic renewal worth a total of $2,000,000. | | MR C. Zachary received a 1-year contract through automatic renewal worth a total of $300,000. | | 2B L. Randle received a 1-year contract through automatic renewal worth a total of $500,000. | | 1B L. May received a 1-year contract through automatic renewal worth a total of $750,000. | | RF R. Zisk received a 1-year contract through automatic renewal worth a total of $750,000. | | MR V. Romo received a 1-year contract through automatic renewal worth a total of $750,000. | | CF G. Foster received a 1-year contract through automatic renewal worth a total of $2,100,000. | | C S. Yeager received a 1-year contract through automatic renewal worth a total of $300,000. | | CF B. Bradford received a 1-year contract through automatic renewal worth a total of $300,000. |
| Thursday, November 2nd, 1972 | | MR C. Carroll received a 1-year contract through arbitration worth a total of $2,000,000. | | SP B. Moose received a 1-year contract through arbitration worth a total of $5,500,000. | | SP F. Jenkins received a 1-year contract through arbitration worth a total of $4,796,100. | | MR J. Ray received a 1-year contract through arbitration worth a total of $2,756,600. | | SP L. Tiant received a 1-year contract through arbitration worth a total of $1,300,000. | | MR P. Lindblad received a 1-year contract through arbitration worth a total of $977,500. |
| Thursday, September 14th, 1972 | | Purchased the contract of C S. Yeager from Triple A Portland. |
| Wednesday, August 16th, 1972 | | Placed 1B J. Mayberry on the 15-day disabled list. | | Purchased the contract of RF R. Zisk from Triple A Portland. |
| Tuesday, August 1st, 1972 | | Placed MR B. Lersch on the 60-day disabled list. | | Purchased the contract of MR C. Zachary from Triple A Portland. |
| Sunday, July 16th, 1972 | | Placed SP B. Moose on the 15-day disabled list. | | Purchased the contract of SP R. Nelson from Triple A Portland. |
| Thursday, June 1st, 1972 | | Placed CF R. Monday on the 15-day disabled list. | | Purchased the contract of CF G. Foster from Triple A Portland. |
| Sunday, May 21st, 1972 | | Signed 3B P. Rose to a 3-year contract extension worth a total of $4,950,000. |
| Sunday, April 16th, 1972 | | Traded 34-year-old shortstop R. Hansen to the Cleveland Barons, getting a 3rd round draft pick in return. |
| Monday, November 1st, 1971 | | SP M. Hedlund received a 1-year contract through automatic renewal worth a total of $1,500,000. | | C T. Munson received a 1-year contract through automatic renewal worth a total of $2,300,000. | | SP B. Moose received a 1-year contract through automatic renewal worth a total of $2,400,000. | | SP T. Griffin received a 1-year contract through automatic renewal worth a total of $300,000. | | MR J. Ray received a 1-year contract through automatic renewal worth a total of $1,500,000. | | 1B J. Mayberry received a 1-year contract through automatic renewal worth a total of $1,500,000. | | SS M. Belanger received a 1-year contract through automatic renewal worth a total of $750,000. | | SP D. Bosman received a 1-year contract through automatic renewal worth a total of $1,500,000. | | C R. Hundley received a 1-year contract through automatic renewal worth a total of $300,000. | | MR B. Lersch received a 1-year contract through automatic renewal worth a total of $750,000. | | MR G. Culver received a 1-year contract through automatic renewal worth a total of $750,000. | | CF R. Monday received a 1-year contract through automatic renewal worth a total of $1,000,000. | | RF R. Zisk received a 1-year contract through automatic renewal worth a total of $750,000. | | SP R. Nelson received a 1-year contract through automatic renewal worth a total of $2,000,000. | | MR V. Romo received a 1-year contract through automatic renewal worth a total of $750,000. | | MR P. Lindblad received a 1-year contract through automatic renewal worth a total of $1,000,000. | | 2B L. Randle received a 1-year contract through automatic renewal worth a total of $500,000. | | 1B L. May received a 1-year contract through automatic renewal worth a total of $750,000. | | RF B. Williams becomes a free-agent. | | 3B D. Evans received a 1-year contract through automatic renewal worth a total of $2,000,000. | | RF J. Lahoud received a 1-year contract through automatic renewal worth a total of $300,000. | | SS T. Foli received a 1-year contract through automatic renewal worth a total of $300,000. | | 2B M. Andrews received a 1-year contract through automatic renewal worth a total of $500,000. | | CF B. Bradford received a 1-year contract through automatic renewal worth a total of $300,000. |
| Friday, October 29th, 1971 | | MR C. Carroll received a 1-year contract through arbitration worth a total of $2,200,000. | | SP F. Jenkins received a 1-year contract through arbitration worth a total of $2,160,000. | | 3B P. Rose received a 1-year contract through arbitration worth a total of $1,400,000. | | SP L. Tiant received a 1-year contract through arbitration worth a total of $1,400,000. |
| Friday, October 8th, 1971 | | 2B B. Moran retires. |
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