ST. LOUIS -- The Cardinals got one player back from the 10-day disabled list Thursday when they activated third baseman Matt Carpenter (lower back strain). But another player headed for the IL when catcher Yadier Molina, who never has shaken a right thumb strain, was moved to the 10-day IL.
That IL assignment was backdated three days to Monday but manager Mike Shildt, while not offering a precise timetable, said, Thursday night, "You're looking beyond the 10 days.
"(The injury) is similar to what he had. It hasn't increased or decreased or worsened ... or is more problematic. It just hasn't healed as well, so he's kind back to where he was.
"He just needs time. What that time looks like ... you're probably looking in a three-week range."
Andrew Knizner, who was to have played in the Class AAA All-Star Game on Wednesday night, instead prepared to join the team as Matt Wieters' backup when the Cardinals resume play Friday night against Arizona. Carson Kelly, previously the Cardinals' backup catcher, is Arizona's top receiver now.
Molina had missed 12 games the first time he went on the IL and has knocked in only three runs since his return, without hitting a homer, compromised at bat but not in the field.
"A certain contact in a part of the bat, or a certain swing just flares it up or upsets it," Shildt said. "Clearly, it doesn't affect his catching and throwing, because he did that really well.
"But he's going to need more time to heal so he can become more offensively competent consistently -- to his capabilities."
Also, the Cardinals purchased the contract of left-handed reliever Chasen Shreve from Memphis. Shreve, acquired with right-hander Giovanny Gallegos from the New York Yankees last year for first baseman Luke Voit, had been outrighted to Memphis this spring after a poor camp.
Shreve takes the 40-man roster spot of reliever Jordan Hicks (elbow surgery), who was moved to the 60-day IL from the 10-day IL.