| 2008 Free Agent Signees | ||||||
| Pos | Last | First | Team | Salary | Years | Date Signed |
| RP | Rivera | Mariano | Firemen | $8,800,000 | 2 | 15-Jan |
| RP | Burton | Jared | Clams | $600,000 | 1 | 15-Jan |
| OF | Ordonez | Magglio | Roosters | $7,000,000 | 2 | 16-Jan |
| 3B | Lowell | Mike | Grenades | $1,500,000 | 2 | 16-Jan |
| SP | Vazquez | Javier | 66ers | $5,800,000 | 1 | 16-Jan |
| RP | Moylan | Peter | Robots | $1,100,000 | 2 | 16-Jan |
| 1B | Pena | Carlos | 66ers | $5,500,000 | 2 | 17-Jan |
| C | Pierzynski | A.J. | Foxes | $1,300,000 | 1 | 17-Jan |
| C | Molina | Ben | Robots | $1,200,000 | 2 | 17-Jan |
| RP | Nunez | Leo | Roundabouts | $600,000 | 1 | 17-Jan |
| RP | Lyon | Brandon | Robots | $1,000,000 | 2 | 17-Jan |
| RP | Wagner | Billy | Foxes | $8,800,000 | 2 | 18-Jan |
| RP | Percival | Troy | Foxes | $4,400,000 | 1 | 18-Jan |
| RP | Jones | Todd | Foxes | $4,100,000 | 1 | 18-Jan |
| OF | Griffey | Ken | Heroes | $1,500,000 | 1 | 18-Jan |
| OF | Bonds | Barry | Starfish | $1,600,000 | 1 | 18-Jan |
| RP | Isringhausen | Jason | Clams | $5,850,000 | 2 | 18-Jan |
| 2B | Roberts | Brian | Grenades | $10,100,000 | 1 | 18-Jan |
| C | Varitek | Jason | Heroes | $1,100,000 | 1 | 18-Jan |
| OF | Spilborghs | Ryan | Roundabouts | $800,000 | 1 | 19-Jan |
| RP | Neshek | Pat | Roundabouts | $2,000,000 | 2 | 19-Jan |
| SS | Guillen | Carlos | Firemen | $9,000,000 | 1 | 19-Jan |
| DH | Thome | Jim | Firemen | $6,600,000 | 1 | 19-Jan |
| RP | Cordero | Francisco | Starfish | $8,200,000 | 2 | 19-Jan |
| OF | Blake | Casey | Robots | $800,000 | 1 | 19-Jan |
| RP | Shields | Scot | Clams | $1,500,000 | 3 | 19-Jan |
| SS | Renteria | Edgar | Firemen | $2,000,000 | 2 | 20-Jan |
| RP | Qualls | Chad | Robots | $900,000 | 2 | 20-Jan |
| 2B | Kent | Jeff | 66ers | $1,400,000 | 1 | 20-Jan |
| SP | Smoltz | John | Grenades | $9,200,000 | 1 | 20-Jan |
| RP | Borowski | Joe | Grenades | $5,400,000 | 1 | 20-Jan |
| RP | Lackey | John | Roundabouts | $12,000,000 | 1 | 20-Jan |
| 2B | Matsui | Kaz | Clams | $900,000 | 2 | 21-Jan |
| 1B | Wigginton | Ty | Heroes | $1,400,000 | 1 | 21-Jan |
| 1B | Tracy | Chad | Robots | $700,000 | 2 | 21-Jan |
| RP | Rauch | Jon | Starfish | $1,080,000 | 2 | 21-Jan |
| OF | Damon | Johnny | Heroes | $2,430,000 | 2 | 21-Jan |
| SP | Perez | Oliver | Outlaws | $5,000,000 | 2 | 21-Jan |
| SP | Harang | Aaron | Firemen | $9,000,000 | 2 | 22-Jan |
| SS | Cabrera | Orlando | Heroes | $2,000,000 | 1 | 22-Jan |
| SP | Reyes | Jo-Jo | Roundabouts | $900,000 | 2 | 22-Jan |
| RP | Paulino | Felipe | Roundabouts | $900,000 | 2 | 23-Jan |
| OF | Sheffield | Gary | Starfish | $3,510,000 | 1 | 23-Jan |
| SP | Johnson | Randy | Starfish | $3,100,000 | 1 | 23-Jan |
| 3B | Jones | Chipper | Roundabouts | $9,450,000 | 1 | 23-Jan |
| OF | Burrell | Pat | Arsenal | $1,700,000 | 2 | 23-Jan |
| RP | Soriano | Rafael | Clams | $8,280,000 | 1 | 23-Jan |
| RP | Betancourt | Rafael | Outlaws | $4,200,000 | 1 | 23-Jan |
| RP | Morillo | Juan | Roundabouts | $900,000 | 2 | 24-Jan |
| C | Posada | Jorge | Starfish | $14,900,000 | 1 | 24-Jan |
| RP | Reyes | Al | Foxes | $1,400,000 | 1 | 24-Jan |
| SP | Escobar | Kelvim | Heroes | $5,600,000 | 2 | 24-Jan |
| RP | Dotel | Octavio | Robots | $700,000 | 2 | 24-Jan |
| RP | Embree | Alan | Robots | $1,200,000 | 1 | 24-Jan |
| OF | Hunter | Torii | Roosters | $4,800,000 | 2 | 24-Jan |
| OF | Rowand | Aaron | Arsenal | $1,200,000 | 2 | 25-Jan |
| C | Rodriguez | Ivan | Roosters | $3,700,000 | 1 | 25-Jan |
| OF | Drew | J.D. | Grenades | $700,000 | 1 | 26-Jan |
| RP | Fuentes | Brian | Grenades | $1,600,000 | 2 | 26-Jan |
| 2B | Johnson | Kelly | Arsenal | $1,300,000 | 2 | 26-Jan |
| SP | Lilly | Ted | Roosters | $5,600,000 | 2 | 26-Jan |
| C | Snyder | Chris | Grenades | $600,000 | 1 | 27-Jan |
| RP | Bradford | Chad | Robots | $800,000 | 1 | 27-Jan |
| SP | Schilling | Curt | Foxes | $2,600,000 | 1 | 27-Jan |
| OF | Cameron | Mark | 66ers | $540,000 | 1 | 28-Jan |
| RP | Heilman | Aaron | Foxes | $1,600,000 | 2 | 28-Jan |
| RP | Walker | Jamie | Robots | $1,000,000 | 1 | 28-Jan |
| C | Navarro | Dioner | Firemen | $990,000 | 2 | 28-Jan |
| SP | Westbrook | Jake | Roosters | $600,000 | 1 | 28-Jan |
| SP | Millwood | Kevin | Clams | $600,000 | 1 | 29-Jan |
| OF | Ibanez | Raul | Foxes | $1,500,000 | 1 | 29-Jan |
| SP | Hernandez | Orlando | Roundabouts | $1,260,000 | 1 | 29-Jan |
| RP | Thatcher | Joe | Roundabouts | $800,000 | 1 | 29-Jan |
| 3B | Feliz | Pedro | Arsenal | $600,000 | 1 | 29-Jan |
| OF | Dye | Jermaine | Roundabouts | $2,000,000 | 1 | 29-Jan |
| SP | Lowe | Derek | Robots | $3,060,000 | 2 | 29-Jan |
| SP | Mulder | Mark | Clams | $800,000 | 2 | 30-Jan |
| C | Doumit | Ryan | Clams | $700,000 | 1 | 30-Jan |
| C | Hernandez | Ramon | Outlaws | $1,500,000 | 2 | 30-Jan |
| 3B | Teahen | Mark | Grenades | $600,000 | 1 | 30-Jan |
| 2B | Polanco | Placido | Arsenal | $1,100,000 | 2 | 30-Jan |
| OF | Alou | Moises | Outlaws | $800,000 | 1 | 31-Jan |
| SP | Maddux | Greg | Grenades | $1,900,000 | 1 | 31-Jan |
| RP | Speier | Justin | 66ers | $720,000 | 1 | 31-Jan |
| RP | Accardo | Jeremy | 66ers | $3,300,000 | 1 | 31-Jan |
| SS | Lugo | Julio | Roundabouts | $2,000,000 | 1 | 31-Jan |
| SP | Zito | Barry | Arsenal | $800,000 | 2 | 31-Jan |
| SP | Sanchez | Jonathan | Clams | $700,000 | 2 | 31-Jan |
| OF | Bradley | Milton | Roundabouts | $1,100,000 | 1 | 31-Jan |
| OF | Baldelli | Rocco | Robots | $1,500,000 | 2 | 31-Jan |
| 2B | Ellis | Mark | Roundabouts | $800,000 | 2 | 31-Jan |
| OF | Guillen | Jose | 66ers | $1,200,000 | 2 | 1-Feb |
| RP | Howry | Bob | Grenades | $800,000 | 2 | 1-Feb |
| OF | Kearns | Austin | Robots | $800,000 | 1 | 1-Feb |
| RP | Rodney | Fernando | Roosters | $1,100,000 | 1 | 1-Feb |
| RP | Aquino | Greg | Robots | $600,000 | 1 | 2-Feb |
| OF | Ankiel | Rick | Robots | $1,300,000 | 3 | 2-Feb |
| C | Paulino | Ronny | Roundabouts | $540,000 | 1 | 2-Feb |
| C | Molina | Yadier | Outlaws | $800,000 | 2 | 3-Feb |
| SP | Glavine | Tom | Heroes | $600,000 | 1 | 4-Feb |
| RP | Miller | Justin | 66ers | $600,000 | 1 | 4-Feb |
| 1B | Overbay | Lyle | Roosters | $1,100,000 | 1 | 4-Feb |
| DH | Thomas | Frank | Grenades | $800,000 | 1 | 5-Feb |
| RP | Cruz | Juan | Roundabouts | $700,000 | 2 | 5-Feb |
| SP | Pettitte | Andy | Roosters | $1,000,000 | 1 | 5-Feb |
| RP | Gordon | Tom | Grenades | $540,000 | 1 | 6-Feb |
| SS | Keppinger | Jeff | 66ers | $600,000 | 1 | 6-Feb |
| OF | Winn | Randy | Roundabouts | $600,000 | 1 | 7-Feb |
| 1B | Johnson | Nick | Roundabouts | $800,000 | 1 | 10-Feb |
| C | Ross | David | Heroes | $700,000 | 1 | 10-Feb |
| OF | Diaz | Matt | Roundabouts | $600,000 | 1 | 11-Feb |
| RP | Guardado | Eddie | Foxes | $900,000 | 1 | 11-Feb |
| C | Lo Duca | Paul | Arsenal | $600,000 | 1 | 12-Feb |
| RP | Kobayashi | Masahide | Firemen | $700,000 | 2 | 13-Feb |
| OF | Duncan | Chris | Grenades | $700,000 | 2 | 13-Feb |
| RP | Wheeler | Dan | Arsenal | $600,000 | 1 | 13-Feb |
| 3B | Inge | Brandon | Roosters | $600,000 | 1 | 13-Feb |
| 1B | Garciaparra | Nomar | Arsenal | $600,000 | 1 | 14-Feb |
| SP | Mussina | Mike | Heroes | $600,000 | 1 | 15-Feb |
| RP | Meredith | Cla | Arsenal | $600,000 | 1 | 18-Feb |
| RP | Cruceta | Francisco | Firemen | $600,000 | 1 | 19-Feb |
| SP | Robertson | Nate | Arsenal | $600,000 | 1 | 19-Feb |
| C | Zaun | Gregg | 66ers | $600,000 | 1 | 20-Feb |
| RP | Lewis | Jensen | Firemen | $700,000 | 2 | 20-Feb |
| SP | Arroyo | Bronson | Arsenal | $600,000 | 1 | 21-Feb |
| C | Laird | Gerald | Roosters | $600,000 | 1 | 21-Feb |
| OF | Nady | Xavier | Roosters | $600,000 | 1 | 24-Feb |
| OF | Cuddyer | Michael | 66ers | $700,000 | 1 | 25-Feb |
| 2B | Bonifacio | Emilio | Heroes | $600,000 | 1 | 26-Feb |
| 2B | Castillo | Luis | Roosters | $600,000 | 1 | 26-Feb |
| SP | Dempster | Ryan | Arsenal | $700,000 | 1 | 26-Feb |
| 2B | Richar | Danny | Heroes | $600,000 | 1 | 27-Feb |
| OF | Cabrera | Melky | Roosters | $600,000 | 1 | 27-Feb |
| OF | Matthews | Gary | Arsenal | $600,000 | 1 | 28-Feb |
| SP | Wakefield | Tim | Arsenal | $600,000 | 1 | 3-Mar |
| RP | Weathers | David | Arsenal | $600,000 | 1 | 6-Mar |
| RP | Frasor | Jason | Arsenal | $600,000 | 1 | 6-Mar |
| SP | Patterson | John | Heroes | $600,000 | 1 | 8-Mar |