| Transactions |
| Date | Team | Player | Type | OthTm | EffDate | When | Appl |
| 4/3/1979 | Phi | Brusstar | Placed on Injured List | | | Before | Yes |
| 4/3/1979 | Phi | Christenson | Placed on Injured List | | | Before | Yes |
| 4/25/1979 | Phi | Mackanin | Placed on Injured List | | 4/25/1979 | Before | Yes |
| 4/27/1979 | Phi | Anderson | Promoted to active roster | | | Before | Yes |
| 4/27/1979 | Phi | Meoli | Promoted to active roster | | | Before | Yes |
| 4/27/1979 | Phi | Smith | Demoted to reserve roster | | | Before | Yes |
| 5/4/1979 | Phi | Aviles | Promoted to active roster | | | Before | No |
| 5/4/1979 | Phi | Trillo | Placed on Injured List | | 5/4/1979 | Before | No |
| 5/11/1979 | Phi | Kaat | Traded away | NYA | | Before | No |
| 5/12/1979 | Phi | Christenson | Activated from Injured List | | | Before | No |
| 5/25/1979 | Phi | Bowa | Placed on Injured List | | 5/25/1979 | Before | No |
| 5/25/1979 | Phi | Harrelson | Signed | | | Before | No |
| 6/9/1979 | Phi | Bowa | Activated from Injured List | | | Before | No |
| 6/9/1979 | Phi | Meoli | Demoted to reserve roster | | | Before | No |
| 6/14/1979 | Phi | Bird | Placed on Injured List | | 6/14/1979 | Before | No |
| 6/16/1979 | Phi | Lonborg | Released | | | Before | No |
| 6/16/1979 | Phi | Trillo | Activated from Injured List | | | Before | No |
| 6/18/1979 | Phi | Saucier | Promoted to active roster | | | Before | No |
| 6/27/1979 | Phi | Aviles | Demoted to reserve roster | | | Before | No |
| 6/27/1979 | Phi | Brusstar | Activated from Injured List | | | Before | No |
| 7/2/1979 | Phi | Ruthven | Placed on Injured List | | 7/2/1979 | Before | No |
| 7/4/1979 | Phi | Christenson | Placed on Injured List | | 7/4/1979 | Before | No |
| 7/5/1979 | Phi | Bird | Activated from Injured List | | | Before | No |
| 7/5/1979 | Phi | Noles | Promoted to active roster | | | Before | No |
| 7/25/1979 | Phi | Brusstar | Demoted to reserve roster | | | Before | No |
| 7/25/1979 | Phi | Ruthven | Activated from Injured List | | | Before | No |
| 8/3/1979 | Phi | Cardenal | Traded away | NYN | | Before | No |
| 8/3/1979 | Phi | Christenson | Activated from Injured List | | | Before | No |
| 8/12/1979 | Phi | Noles | Demoted to reserve roster | | | Before | No |
| 8/12/1979 | Phi | Vukovich | Promoted to active roster | | | Before | No |
| 8/16/1979 | Phi | Ruthven | Placed on Injured List | | 8/16/1979 | Before | No |
| 8/22/1979 | Phi | Noles | Promoted to active roster | | | Before | No |
| 9/1/1979 | Phi | Aviles | Promoted to active roster | | | Before | No |
| 9/1/1979 | Phi | Brusstar | Promoted to active roster | | | Before | No |
| 9/1/1979 | Phi | Mackanin | Activated from Injured List | | | Before | No |
| 9/1/1979 | Phi | Moreland | Promoted to active roster | | | Before | No |
| 9/1/1979 | Phi | Poff | Promoted to active roster | | | Before | No |
| 9/1/1979 | Phi | Smith | Promoted to active roster | | | Before | No |
| 9/7/1979 | Phi | Kucek | Promoted to active roster | | | Before | No |
| 9/11/1979 | Phi | Larson | Promoted to active roster | | | Before | No |