| Name | Pos | Salary | Through | Years Left | Notes | Years in Majors |
| R. Sanders | RF | $6,000,000 | 2005 | 2 years left | | 13 years |
| T. Nixon | CF | $4,778,571 | 2004 | 1 years left | Arbitration (Estimate: $4,640,000), could become Free Agent with 30 more days of service this year. | 5 years |
| J. Santana | SP | $4,442,857 | 2004 | 1 years left | Arbitration (Estimate: $3,850,000), could become Free Agent with 172 more days of service this year. | 5 years |
| B. Boone | 2B | $4,372,625 | 2005 | 2 years left | | 9 years |
| S. Shields | SP | $4,214,286 | 2004 | 1 years left | Arbitration (Estimate: $1,420,000) | 4 years |
| B. Gates | 2B | $2,550,000 | 2005 | 2 years left | | 8 years |
| O. Perez | MR | $1,971,429 | 2004 | 1 years left | Extension signed. | 6 years |
| A. Gonzalez | SS | $1,800,000 | 2004 | 1 years left | Arbitration (Estimate: $1,020,000), could become Free Agent with 93 more days of service this year. | 5 years |
| B. Fullmer | 1B | $1,528,571 | 2004 | 1 years left | Arbitration (Estimate: $1,340,000), could become Free Agent with 94 more days of service this year. | 5 years |
| P. Lo duca | C | $1,500,000 | 2005 | 2 years left | | 5 years |
| R. Ledee | LF | $1,342,857 | 2004 | 1 years left | Arbitration (Estimate: $1,530,000), could become Free Agent with 138 more days of service this year. | 5 years |
| O. Daal | SP | $1,207,143 | 2004 | 1 years left | Arbitration (Estimate: $300,000), could become Free Agent with 6 more days of service this year. | 5 years |
| M. Hampton | MR | $930,000 | 2005 | 2 years left | | 9 years |
| S. Pegues | RF | $380,000 | 2004 | 1 years left | Arbitration (Estimate: $300,000), could become Free Agent with 168 more days of service this year. | 5 years |
| C. Politte | SP | $350,000 | 2004 | 1 years left | Arbitration (Estimate: $1,270,000) | 4 years |
| K. Tolar | MR | $350,000 | 2004 | 1 years left | Arbitration (Estimate: $390,000) | 4 years |
| P. Polanco | SS | $350,000 | 2004 | 1 years left | Arbitration (Estimate: $300,000) | 4 years |
| D. Hansen | 3B | $300,000 | 2004 | 1 years left | Free agent after this season! | 9 years |
| G. Matthews | CF | $300,000 | 2004 | 1 years left | Automatic Resign. | 1 years |
| D. Baez | MR | $300,000 | 2004 | 1 years left | Arbitration (Estimate: $340,000) | 3 years |
| R. Brown | CF | $300,000 | 2004 | 1 years left | Arbitration (Estimate: $3,060,000) | 3 years |
| R. Casanova | C | $300,000 | 2004 | 1 years left | Possible Arbitration, 94 more days of service needed this year. | 2 years |
| B. Myers | SP | $300,000 | 2004 | 1 years left | Possible Arbitration, 83 more days of service needed this year. | 2 years |
| C. Febles | RF | $300,000 | 2004 | 1 years left | Arbitration (Estimate: $300,000) | 3 years |
| Z. Greinke | SP | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| R. Dykhoff | MR | $300,000 | 2004 | 1 years left | Automatic Resign. | 1 years |
| B. Evans | MR | $300,000 | 2004 | 1 years left | Extension signed. | 7 years |
| A. Harang | SP | $300,000 | 2004 | 1 years left | Possible Arbitration, 36 more days of service needed this year. | 2 years |
| E. Eckenstahler | CL | $300,000 | 2004 | 1 years left | Arbitration (Estimate: $1,210,000) | 3 years |
| J. Serrano | MR | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| F. Francisco | MR | $300,000 | 2004 | 1 years left | Automatic Resign. | 0 years |
| B. Hemphill | C | Minor-League-Contract | - | - | | 0 years |
| C. Bellinger | 1B | Minor-League-Contract | - | - | | 0 years |
| C. George | SP | Minor-League-Contract | - | - | | 0 years |
| T. Shinjo | CF | Minor-League-Contract | - | - | | 0 years |
| J. Kennedy | SP | Minor-League-Contract | - | - | | 0 years |
| G. Dobbs | 3B | Minor-League-Contract | - | - | | 0 years |
| D. Cortes | MR | Minor-League-Contract | - | - | | 0 years |
| J. Martinez | MR | Minor-League-Contract | - | - | | 0 years |
| G. Sizemore | LF | Minor-League-Contract | - | - | | 0 years |
| B. Jodie | SP | Minor-League-Contract | - | - | | 0 years |
| S. Downs | SP | Minor-League-Contract | - | - | | 1 years |
| J. Duncan | CF | Minor-League-Contract | - | - | | 0 years |
| C. Bartosh | MR | Minor-League-Contract | - | - | | 0 years |
| A. Miles | 2B | Minor-League-Contract | - | - | | 0 years |
| M. Asencio | MR | Minor-League-Contract | - | - | | 0 years |
| M. Mcleary | MR | Minor-League-Contract | - | - | | 0 years |
| J. Szuminski | MR | Minor-League-Contract | - | - | | 0 years |
| W. Obermueller | SP | Minor-League-Contract | - | - | | 0 years |
| S. Marsonek | MR | Minor-League-Contract | - | - | | 0 years |
| V. Pascucci | LF | Minor-League-Contract | - | - | | 0 years |
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