Gonzalez will start for the Orioles tonight while Jair Jurrjens was optioned to create roster room.
Pierzynski has been out since May 9. Robinson Chirinos and Josh Lindblom have both been demoted to the minors.
Ruiz will likely be out for a month with a strained hamstring. Cloyd will start on Tuesday for the Phillies.
Cueto has missed a month of the season due to a lat strain. Neftali Soto was demoted to Triple-A to create room on the roster.
The Blue Jays Josh Johnson is ready to begin working his way back from the bicep injury that has sidelined him since late April.
The Atlanta right fielder has been out since April 22 after having an emergency appendectomy while Walden is suffering from shoulder inflammation.
The Cubs will be getting their Ace back very soon, but questions remain about how long Garza will stay with the team.
The Red Sox closer has been on the disabled list since May 6 but will have little competition for the closer spot now that Joel Hanrahan is out for the year.
The Braves announced that Venters had the reconstructive surgery Thursday after seeing Dr. James Andrews for a second time.