The St. Louis Cardinals activated third baseman Matt Carpenter from the 10-day injured list on Thursday and sent catcher Yadier Molina to the IL with a strained tendon in his right thumb.
Carpenter, 33, has not played since June 28 due a lower back strain. He is batting .216 with 10 homers and 28 RBIs in 77 games this season.
Molina, who turns 37 on Saturday, has not started a game since July 3 and was last used as a pinch hitter on July 6. His move to the 10-day IL is retroactive to Monday. Molina is hitting .261 with four homers and 36 RBIs in 71 games.
The Cardinals announced five other transactions Thursday.
St. Louis called up left-hander Chasen Shreve from Triple-A Memphis and said it will recall catcher Andrew Knizner from Memphis prior to Friday's game against the Arizona Diamondbacks.
Shreve, who turns 29 on Friday, was 3-4 with a 3.93 ERA in 60 appearances last season with the New York Yankees and Cardinals.
Knizner, 24, made his major league debut on June 2 and was 0-for-7 in two games with St. Louis.
The team also optioned left-hander Tyler Webb and first baseman/outfielder Rangel Ravelo to Memphis and transferred right-hander Jordan Hicks from the 10-day to the 60-day injured list.