| MLB |
| Apr 20 | | |
| Houston Astros | Aneury Rodriguez P | Reinstated from league suspension |
|
| Los Angeles Angels | Brandon Wood SS | Designated for assignment |
| | Erick Aybar SS | Recalled from minors rehab |
|
|
| Apr 19 | | |
| Cleveland Indians | Jeanmar Gomez P | Called up from minors |
| | Travis Buck LF | Sent to minors |
|
| Colorado Rockies | Ian Stewart 3B | Sent to minors |
|
| Detroit Tigers | Omir Santos C | Purchased from minors |
|
| Milwaukee Brewers | Corey Hart RF | Sent to minors for rehabilitation |
| | Shaun Marcum P | Placed on bereavement/family medical emergency list |
| | Zack Greinke P | Sent to minors for rehabilitation |
| | Mike McClendon P | Called up from minors |
|
| Minnesota Twins | Eric Hacker P | Called up from minors |
|
| New York Mets | Justin Turner 2B | Called up from minors |
| | Brad Emaus 2B | Designated for assignment |
|
| Philadelphia Phillies | Mike Zagurski P | Called up from minors |
|
| Seattle Mariners | Justin Smoak 1B | Placed on bereavement/family medical emergency list |
| | David Aardsma P | Sent to minors for rehabilitation |
| | Carlos Peguero CF | Called up from minors |
|
| St. Louis Cardinals | Mark Hamilton PH | Called up from minors |
|
| Toronto Blue Jays | Frank Francisco P | Recalled from minors rehab |
| | Jesse Litsch P | Sent to minors |
|
|
| Apr 18 | | |
| Baltimore Orioles | Clay Rapada P | Purchased from minors |
| | Justin Duchscherer P | Transferred to 60-day DL
(Strained left hip) |
|
| Boston Red Sox | Hideki Okajima P | Called up from minors |
|
| Cincinnati Reds | Jeremy Hermida RF | Purchased from minors |
| | Jared Burton P | Transferred to 60-day DL
(Right shoulder inflammation) |
|
| Colorado Rockies | Clayton Mortensen P | Called up from minors |
| | Alan Johnson P | Sent to minors |
|
| Detroit Tigers | Joel Zumaya P | Transferred to 60-day DL
(Right elbow inflammation) |
|
| Los Angeles Angels | Erick Aybar SS | Sent to minors for rehabilitation |
|
| Los Angeles Dodgers | Xavier Paul LF | Designated for assignment |
| | Jerry Sands LF | Purchased from minors |
|
| Minnesota Twins | Jim Hoey P | Called up from minors |
| | Alex Burnett P | Sent to minors |
|
| Oakland Athletics | Rich Harden P | Transferred to 60-day DL
(Strained lat muscle, right side) |
| | David Purcey P | Traded to Oakland
(for RHP Danny Farquhar) |
|
| Texas Rangers | Mark Lowe P | Sent to minors |
| | Colby Lewis P | Reinstated from bereavement/family medical emergency list |
|
| Toronto Blue Jays | David Purcey P | Traded to Oakland
(for RHP Danny Farquhar) |
| | Edwin Encarnacion DH | Reinstated from bereavement/family medical emergency list |
|
|
| Apr 17 | | |
| Boston Red Sox | Matt Albers P | Sent to minors for rehabilitation |
| | Felix Doubront P | Sent to minors |
|
| Cincinnati Reds | Homer Bailey P | Sent to minors for rehabilitation |
|
| Cleveland Indians | Grady Sizemore CF | Recalled from minors rehab |
|
| Houston Astros | Aneury Rodriguez P | Starting to serve suspension |
|
| Los Angeles Dodgers | Jay Gibbons PH | Recalled from minors rehab |
| | Vicente Padilla P | Sent to minors for rehabilitation |
|
| Milwaukee Brewers | Luis Figueroa PH | Signed to a minor league contract |
|
| Minnesota Twins | Jeff Manship P | Sent to minors |
|
| New York Mets | Dillon Gee P | Called up from minors |
| | Pat Misch P | Designated for assignment |
|
| San Francisco Giants | Cody Ross CF | Sent to minors for rehabilitation |
| | Ryan Vogelsong P | Purchased from minors |
|
| Toronto Blue Jays | Mike McCoy CF | Sent to minors |
|
| Washington Nationals | Collin Balester P | Called up from minors |
