| Last updated: Mon, May 20, 2013, 16:36 EDT |
| Date | Player | Pos. | Transaction |
| 5/18 | Brad Brach | P | Sent to Minors |
| 5/18 | Mike Wilson | LF | Signed to a Minor League Contract |
| 5/18 | Carlos Quentin | LF | Reinstated from Paternity Leave List |
| 5/17 | Tim Stauffer | P | Purchased From Minors |
| 5/17 | Thad Weber | P | Designated for Assignment |
| 5/17 | Carlos Quentin | LF | Placed on Paternity Leave List |
| 5/16 | Fautino De Los Santos | P | Cleared Waivers and Became a Free Agent |
| 5/16 | Clayton Richard | P | Sent to Minors, For Rehabilitation |
| 5/14 | Fautino De Los Santos | P | Released |
| 5/11 | Fautino De Los Santos | P | Designated for Assignment |
| 5/11 | Burch Smith | P | Purchased From Minors |
| 5/10 | Brad Boxberger | P | Sent to Minors |
| 5/5 | Tyson Ross | P | Removed From 15-Day DL, (Left shoulder subluxation) |
| 5/5 | Tyson Ross | P | Recalled From Minors, Rehab Assignment |
| 5/5 | Clayton Richard | P | Placed on 15-Day DL, (Intestinal virus) |
| 5/4 | James Darnell | 3B | Sent to Minors |
| 5/4 | James Darnell | 3B | Removed From 15-Day DL, (Strained left oblique) |
| 5/3 | James Darnell | 3B | Recalled From Minors, Rehab Assignment |
| 5/2 | Brad Boxberger | P | Called Up from Minors |
| 5/2 | Robbie Erlin | P | Sent to Minors |
| 4/30 | Tyson Ross | P | Sent to Minors, For Rehabilitation |
| 4/29 | James Darnell | 3B | Sent to Minors, For Rehabilitation |
| 4/24 | Thad Weber | P | Sent to Minors |
| 4/24 | Robbie Erlin | P | Purchased From Minors |
| 4/24 | Logan Forsythe | 2B | Transferred to 60-Day DL, (Plantar fasciitis, right foot) |
| 4/23 | Carlos Quentin | LF | Reinstated From League Suspension |
| 4/20 | Eddie Bonine | P | Signed to a Minor League Contract |
| 4/20 | Tyson Ross | P | Placed on 15-Day DL, (Left shoulder subluxation) |
| 4/20 | Thad Weber | P | Called Up from Minors |
| 4/17 | Chase Headley | 3B | Recalled From Minors, Rehab Assignment |
| 4/17 | Chase Headley | 3B | Removed From 15-Day DL, (Broken left thumb) |
| 4/17 | Cameron Maybin | CF | Placed on 15-Day DL, (Right wrist impingement) |
| 4/14 | Carlos Quentin | LF | Starting to Serve Suspension |
| 4/14 | Thad Weber | P | Sent to Minors |
| 4/14 | Kyle Blanks | LF | Called Up from Minors |
| 4/12 | Carlos Quentin | LF | Suspension Announced By League, (eight games) |
| 4/12 | Chase Headley | 3B | Sent to Minors, For Rehabilitation |
| 4/12 | Thad Weber | P | Purchased From Minors |
| 4/12 | Cody Ransom | 3B | Designated for Assignment |
| 4/9 | Brandon Allen | 1B | Signed to a Minor League Contract |
| 3/31 | Cory Luebke | P | Placed on 60-Day DL, (Recovery from left elbow surgery) |
| 3/31 | James Darnell | 3B | Placed on 15-Day DL, (Strained left oblique) |
| 3/31 | Logan Forsythe | 2B | Placed on 15-Day DL, (Plantar fasciitis, right foot) |
| 3/31 | Jedd Gyorko | 3B | Purchased From Minors |
| 3/31 | Chase Headley | 3B | Placed on 15-Day DL, (Broken left thumb) |
| 3/31 | Casey Kelly | P | Placed on 60-Day DL, (Right elbow surgery, out for season) |
| 3/31 | Cody Ransom | SS | Purchased From Minors |
| 3/30 | Kyle Blanks | LF | Sent to Minors |
| 3/30 | Tommy Layne | P | Sent to Minors |
| 3/28 | Joe Wieland | P | Placed on 60-Day DL, (Recovery from right elbow surgery) |
| 3/27 | Erik Hamren | P | Released |
| 3/24 | Nick Vincent | P | Sent to Minors |
| 3/24 | Freddy Garcia | P | Released |
| 3/23 | Brad Boxberger | P | Sent to Minors |
| 3/18 | Miles Mikolas | P | Sent to Minors |
| 3/12 | Fautino De Los Santos | P | Sent to Minors |
| 2/26 | Joe Wieland | P | Placed on 60-Day DL, (Recovery from right elbow surgery) |
| 2/16 | Clayton Richard | P | Signed, ( 2013)(avoids arbitration) |
| 2/6 | Fautino De Los Santos | P | Acquired Off Waivers From, Milwaukee |
| 1/30 | Chase Headley | 3B | Signed, ( 2013)(avoids arbitration) |
| 1/29 | Arturo Lopez | P | Signed to a Minor League Contract |
| 1/29 | Tim Stauffer | P | Signed to a Minor League Contract |
| 1/28 | Freddy Garcia | P | Signed to a Minor League Contract |
| 1/18 | Edinson Volquez | P | Signed, ( 2013)(avoids arbitration) |
| 1/18 | John Baker | C | Signed, ( 2013)(avoids arbitration) |
| 1/18 | Everth Cabrera | SS | Signed, ( 2013)(avoids arbitration) |
| 1/18 | Joe Thatcher | P | Signed, ( 2013)(avoids arbitration) |
| 1/16 | Will Venable | RF | Signed, ( 2013)(avoids arbitration) |
| 12/21 | Cody Ransom | SS | Signed to a Minor League Contract |
| 12/12 | Gregorio Petit | 2B | Signed to a Minor League Contract |
| 12/12 | Rene Rivera | C | Signed to a Minor League Contract |
| 12/12 | Eddy Rodriguez | C | Signed to a Minor League Contract |
| 12/12 | Sean O'Sullivan | P | Signed to a Minor League Contract |
| 12/3 | Jason Marquis | P | Signed as Free Agent, ( 2013)(one-year contract) |
| 11/29 | Travis Buck | RF | Signed to a Minor League Contract |
| More Transactions |
