| Date | Player | Position | Transaction |
|---|---|---|---|
| May 18 | Duane Below | RP | Called Up from Minors by Miami |
| May 18 | Jon Rauch | RP | Designated for Assignment by Miami |
| May 14 | Jeff Mathis | C | Recalled From Minors Rehab by Miami |
| May 14 | David Aardsma | RP | Released by Miami |
| May 12 | Austin Kearns | LF/RF | Placed on Restricted List by Miami |
| May 12 | Austin Kearns | LF/RF | Reinstated from Bereavement/Family Medical Emergency List by Miami |
| May 12 | Kyle Skipworth | C | Sent to Minors by Miami |
| May 8 | Casey Kotchman | 1B | Transferred to 60-Day DL by Miami (Strained left hamstring) |
| May 8 | Derek Dietrich | SS/2B | Purchased From Minors by Miami |
| May 7 | Henderson Alvarez | SP | Transferred to 60-Day DL by Miami (Mild right shoulder inflammation) |
| May 7 | Nick Green | 3B/2B/SS/1B | Purchased From Minors by Miami |
| May 5 | Nick Green | 3B/2B/SS/1B | Outrighted to Minors by Miami |
| May 5 | Kyle Skipworth | C | Called Up from Minors by Miami |
| May 5 | Austin Kearns | LF/RF | Placed on Bereavement/Family Medical Emergency List by Miami |
| May 2 | Nick Green | 3B/2B/SS/1B | Designated for Assignment by Miami |
| May 2 | Matt Diaz | LF/RF | Purchased From Minors by Miami |
| May 2 | Jeff Mathis | C | Sent to Minors for Rehabilitation by Miami |
| May 2 | Adeiny Hechavarria | SS/3B | Recalled From Minors Rehab by Miami |
| May 1 | Brad Hand | SP | Sent to Minors by Miami |