The Cardinals placed catcher Yadier Molina on the 15-day disabled list Wednesday with a sprained right knee. The club awaiting the result of an MRI exam before providing a timetable on how long Molina may be sidelined.
Also, outfielder Shane Robinson has also been put on the DL with a strained right shoulder strain.
The Cardinals will add outfielder Adron Chambers and first baseman/outfielder Brock Peterson to the roster. In 98 games with Triple-A Memphis, Chambers batted .252 with a .338 on-base percentage and 15 stolen bases.
Peterson returns after he was optioned to Triple-A on Saturday, when Matt Holliday returned from his injury.