| Sunday, October 19th, 1958 |
| MR R. Pollosco received a 1-year contract through automatic renewal worth a total of $300,000. |
| LF C. Vroom received a 1-year contract through automatic renewal worth a total of $300,000. |
| SP H. Chong received a 1-year contract through automatic renewal worth a total of $420,000. |
| 2B H. Equihua received a 1-year contract through automatic renewal worth a total of $300,000. |
| 2B B. Brophy received a 1-year contract through automatic renewal worth a total of $380,000. |
| 2B D. Urbair received a 1-year contract through automatic renewal worth a total of $300,000. |
| SP T. Johannson received a 1-year contract through automatic renewal worth a total of $300,000. |
| SP J. Blumberg becomes a free-agent. |
| CF M. McCaleb received a 1-year contract through automatic renewal worth a total of $300,000. |
| SP G. Acejedo received a 1-year contract through automatic renewal worth a total of $300,000. |
| SP M. Sumaya received a 1-year contract through automatic renewal worth a total of $300,000. |
| SP D. Proffitt becomes a free-agent. |
| MR L. Báez becomes a free-agent. |
| SP H. Alirez becomes a free-agent. |
| C L. Osorro becomes a free-agent. |
| CF T. Álvarez becomes a free-agent. |
| RF J. Sang becomes a free-agent. |
| CF Á. Uriegas becomes a free-agent. |
| LF A. Marns becomes a free-agent. |
| RF C. Reese becomes a free-agent. |
| CF L. Deherrer becomes a free-agent. |
| 1B L. MacRory becomes a free-agent. |
| MR K. Sato becomes a free-agent. |
| C L. Pérez becomes a free-agent. |
| LF O. Gonzáles becomes a free-agent. |
| 2B B. Williams becomes a free-agent. |
| SP B. Aitcheson becomes a free-agent. |
| SP D. Ransdell becomes a free-agent. |
| RF J. Leach becomes a free-agent. |
| MR O. McCree becomes a free-agent. |
| C G. Ferán becomes a free-agent. |
| SP C. Jimeneo becomes a free-agent. |
| SS R. Raudales becomes a free-agent. |
| CF C. Walters becomes a free-agent. |
| CF T. Marinho becomes a free-agent. |
| Thursday, October 16th, 1958 |
| MR H. Leslie received a 1-year contract through arbitration worth a total of $1,782,960. |
| 3B G. Minshull received a 1-year contract through arbitration worth a total of $300,000. |
| MR R. Varel received a 1-year contract through arbitration worth a total of $3,082,000. |
| C R. Bunting received a 1-year contract through arbitration worth a total of $6,800,000. |
| LF J. O'Doran received a 1-year contract through arbitration worth a total of $1,293,750. |
| 1B D. Beatty received a 1-year contract through arbitration worth a total of $558,900. |
| RF N. Valentín received a 1-year contract through arbitration worth a total of $852,480. |
| 2B H. Abreo received a 1-year contract through arbitration worth a total of $300,000. |
