| Name | Pos | Salary | Through | Years Left | Notes | Years in Majors |
| J. Isringhausen | MR | $7,500,000 | 2004 | 1 years left | Extension signed. | 10 years |
| R. Klesko | 1B | $3,819,991 | 2005 | 2 years left | | 10 years |
| D. Erstad | CF | $3,607,143 | 2004 | 1 years left | Arbitration (Estimate: $3,660,000), could become Free Agent with 38 more days of service this year. | 5 years |
| C. Bradford | MR | $2,500,000 | 2006 | 3 years left | | 7 years |
| B. Roberts | SS | $1,985,714 | 2004 | 1 years left | Arbitration (Estimate: $2,440,000) | 4 years |
| J. Jimenez | SP | $1,750,000 | 2006 | 3 years left | | 7 years |
| A. Huff | 3B | $1,707,143 | 2004 | 1 years left | Arbitration (Estimate: $2,560,000) | 4 years |
| C. Allen | LF | $1,542,857 | 2004 | 1 years left | Arbitration (Estimate: $2,080,000) | 4 years |
| T. Enders | MR | $734,000 | 2004 | 1 years left | Automatic Resign. | 1 years |
| G. Ingram | 1B | $350,000 | 2004 | 1 years left | Arbitration (Estimate: $300,000) | 3 years |
| M. Wise | SP | $350,000 | 2004 | 1 years left | Arbitration (Estimate: $300,000) | 4 years |
| A. Everett | SS | $350,000 | 2004 | 1 years left | Arbitration (Estimate: $300,000) | 3 years |
| L. Rivas | 2B | $350,000 | 2004 | 1 years left | Arbitration (Estimate: $300,000) | 4 years |
| G. Kapler | RF | $350,000 | 2004 | 1 years left | Arbitration (Estimate: $300,000), could become Free Agent with 172 more days of service this year. | 5 years |
| N. Lowry | MR | $300,000 | 2004 | 1 years left | Automatic Resign. | 1 years |
| B. Sikorski | SP | $300,000 | 2004 | 1 years left | Possible Arbitration, 48 more days of service needed this year. | 2 years |
| B. Traber | SP | $300,000 | 2004 | 1 years left | Automatic Resign. | 1 years |
| R. Langerhans | LF | $300,000 | 2004 | 1 years left | Automatic Resign. | 1 years |
| D. Ross | C | $300,000 | 2004 | 1 years left | Arbitration (Estimate: $1,710,000) | 3 years |
| M. Restovich | LF | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| K. Youkilis | 3B | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| D. Reyes | SP | $300,000 | 2004 | 1 years left | Arbitration (Estimate: $320,000) | 3 years |
| T. Hall | C | $300,000 | 2004 | 1 years left | Arbitration (Estimate: $1,410,000) | 3 years |
| J. Leicester | MR | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| J. Francis | SP | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| C. Utley | 2B | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| J. Adkins | MR | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| C. Qualls | MR | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| A. Escobar | RF | $300,000 | 2004 | 1 years left | Arbitration (Estimate: $300,000) | 3 years |
| A. Cintron | 1B | $300,000 | 2004 | 1 years left | Arbitration (Estimate: $1,690,000) | 3 years |
| J. Frasor | CL | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| J. Thurston | 2B | Minor-League-Contract | - | - | | 0 years |
| R. Kohlmeier | MR | Minor-League-Contract | - | - | | 0 years |
| M. Miller | MR | Minor-League-Contract | - | - | | 0 years |
| K. Foster | MR | Minor-League-Contract | - | - | | 1 years |
| T. Tiffee | 3B | Minor-League-Contract | - | - | | 0 years |
| M. Martinez | LF | Minor-League-Contract | - | - | | 1 years |
| A. Martinez | MR | Minor-League-Contract | - | - | | 0 years |
| J. Ruffin | MR | Minor-League-Contract | - | - | | 7 years |
| L. Terrero | CF | Minor-League-Contract | - | - | | 0 years |
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