| Last updated: Fri, May 25, 2012, 19:49 EDT |
| Date | Player | Pos. | Transaction |
| 5/25 | Jack Egbert | P | Purchased From Minors |
| 5/25 | D.J. Carrasco | P | Released |
| 5/25 | Robert Carson | P | Sent to Minors |
| 5/22 | Josh Thole | C | Transferred to 15-Day DL, (Concussion) |
| 5/21 | Vinny Rottino | LF | Called Up from Minors |
| 5/21 | Chris Schwinden | P | Sent to Minors |
| 5/20 | Miguel Batista | P | Placed on 15-Day DL, (Lower back stiffness) |
| 5/20 | Chris Schwinden | P | Called Up from Minors |
| 5/19 | Jeremy Hefner | P | Called Up from Minors |
| 5/19 | Pedro Beato | P | Sent to Minors, For Rehabilitation |
| 5/19 | Jordany Valdespin | SS | Sent to Minors |
| 5/17 | Robert Carson | P | Called Up from Minors |
| 5/17 | D.J. Carrasco | P | Designated for Assignment |
| 5/11 | Vinny Rottino | LF | Sent to Minors |
| 5/11 | Ronny Cedeno | SS | Recalled From Minors, Rehab Assignment |
| 5/11 | Ronny Cedeno | SS | Removed From 15-Day DL, (Left intercostal strain) |
| 5/10 | Ronny Cedeno | SS | Sent to Minors, For Rehabilitation |
| 5/8 | Rob Johnson | C | Purchased From Minors |
| 5/8 | Pedro Beato | P | Transferred to 60-Day DL, (Right shoulder stiffness) |
| 5/8 | Josh Thole | C | Placed on 7-Day DL, (Concussion) |
| 5/7 | Jordany Valdespin | SS | Called Up from Minors |
| 5/7 | Ruben Tejada | SS | Placed on 15-Day DL, (Strained right quadriceps muscle) |
| 5/6 | D.J. Carrasco | P | Recalled From Minors, Rehab Assignment |
| 5/6 | D.J. Carrasco | P | Removed From 15-Day DL, (Sprained right ankle) |
| 5/5 | Jordany Valdespin | SS | Sent to Minors |
| 5/4 | Mike Pelfrey | P | Transferred to 60-Day DL, (Swollen right elbow) |
| 5/4 | Chris Schwinden | P | Sent to Minors |
| 5/4 | Vinny Rottino | LF | Purchased From Minors |
| 4/30 | Andres Torres | CF | Removed From 15-Day DL, (Strained left calf) |
| 4/29 | Zach Lutz | 3B | Sent to Minors |
| 4/28 | Andres Torres | CF | Recalled From Minors, Rehab Assignment |
| 4/27 | Chris Schwinden | P | Called Up from Minors |
| 4/26 | Robert Carson | P | Sent to Minors |
| 4/25 | Fred Lewis | LF | Signed to a Minor League Contract |
| 4/25 | Brad Emaus | 2B | Signed to a Minor League Contract |
| 4/24 | Jason Bay | LF | Placed on 15-Day DL, (Fractured left rib) |
| 4/24 | Zach Lutz | 3B | Called Up from Minors |
| 4/24 | Mike Pelfrey | P | Placed on 15-Day DL, (Swollen right elbow) |
| 4/24 | Robert Carson | P | Called Up from Minors |
| 4/23 | Jordany Valdespin | SS | Called Up from Minors |
| 4/23 | Andres Torres | CF | Sent to Minors, For Rehabilitation |
| 4/23 | Jeremy Hefner | P | Sent to Minors |
| 4/23 | Jeremy Hefner | P | Called Up from Minors |
| 4/23 | D.J. Carrasco | P | Sent to Minors, For Rehabilitation |
| 4/23 | Ronny Cedeno | SS | Placed on 15-Day DL, (Left intercostal strain) |
| 4/6 | Kirk Nieuwenhuis | CF | Called Up from Minors |
| 4/6 | Andres Torres | CF | Placed on 15-Day DL, (Strained left calf) |
| 4/4 | Pedro Beato | P | Placed on 15-Day DL, (Right shoulder stiffness) |
| 4/4 | Jonathon Niese | P | Signed, ( 2012-2016; Opt 2017-2018)(five-year extension) |
| 4/4 | Josh Stinson | P | Called Up from Minors, - Not to Report |
| 4/4 | Mike Baxter | RF | Purchased From Minors |
| 4/4 | Miguel Batista | P | Purchased From Minors |
| 4/4 | D.J. Carrasco | P | Placed on 15-Day DL, (Sprained right ankle) |
| 4/1 | Bobby Scales | 3B | Signed to a Minor League Contract |
| 3/30 | Chris Schwinden | P | Sent to Minors |
| 3/29 | Josh Rodriguez | SS | Signed to a Minor League Contract |
| 3/26 | Chris Young | P | Signed to a Minor League Contract |
| 3/26 | Tobi Stoner | P | Released |
| 3/23 | Josh Satin | 1B | Sent to Minors |
| 3/17 | Oswaldo Navarro | SS | Signed to a Minor League Contract |
| 3/15 | Jenrry Mejia | P | Sent to Minors |
| 3/15 | Josh Stinson | P | Sent to Minors |
| 3/10 | Kevin Mulvey | P | Signed to a Minor League Contract |
| 1/27 | Matt Tuiasosopo | | Signed to a Minor League Contract |
| 1/17 | Mike Pelfrey | P | Signed, ( 2012)(avoids arbitration) |
| 1/17 | Andres Torres | PH | Signed, ( 2012)(avoids arbitration) |
| 1/17 | Manny Acosta | P | Signed, ( 2012)(avoids arbitration) |
| 1/17 | Ramon Ramirez | P | Signed, ( 2012)(avoids arbitration) |
| 1/15 | Ronny Cedeno | PH | Signed as Free Agent, ( 2012)(one-year contract) |
| 1/13 | Ronny Cedeno | PH | Signed as Free Agent, ( 2012)(one-year contract) |
| 1/12 | Scott Hairston | PH | Signed as Free Agent, ( 2012)(one-year contract) |
| 1/11 | Daniel Herrera | P | Outrighted to Minors |
| 1/10 | Daniel Herrera | P | Designated for Assignment |
| 1/10 | Fernando Cabrera | | Signed to a Minor League Contract |
| 1/10 | Miguel Batista | P | Signed to a Minor League Contract |
| 1/10 | Sean Kazmar | | Signed to a Minor League Contract |
| 1/6 | Scott Hairston | PH | Signed as Free Agent, ( 2012)(one-year contract) |
| 1/4 | Jeff Stevens | P | Signed to a Minor League Contract |
| 1/3 | Omar Quintanilla | PH | Signed to a Minor League Contract |
| 12/22 | Rob Johnson | C | Signed to a Minor League Contract |
| 12/20 | Frank Francisco | P | Signed as Free Agent, ( 2012-2013)(two-year contract) |
| 12/16 | Mike Baxter | PH | Signed to a Minor League Contract |
| 12/15 | Chuck James | P | Signed to a Minor League Contract |
| 12/14 | Jon Rauch | P | Signed as Free Agent, ( 2012)(one-year contract) |
| 12/12 | Lucas May | PH | Signed to a Minor League Contract |
| 12/12 | Ronny Paulino | PH | Not Offered Contract and Became Free Agent, (non-tendered) |
| 12/12 | Garrett Olson | P | Signed to a Minor League Contract |
| 12/12 | Mike Baxter | PH | Not Offered Contract and Became Free Agent, (non-tendered) |
| 12/7 | Ramon Ramirez | P | Traded From, San Francisco (with OF Andres Torres for OF Angel Pagan) |
| 12/7 | Andres Torres | RF | Traded From, San Francisco (with P Ramon Ramirez for OF Angel Pagan) |
| More Transactions |
