Molina was examined in St. Louis on Thursday for continuing soreness in his right knee. General manager John Mozeliak said that no major issues were found, but that the inflammation in Molina's knee was enough that the club expects to shut down its two-time Gold Glove catcher for the rest of the season.
"There was no structural damage," Mozeliak said. "A little inflammation under the patella, so at this point we just plan on resting him. At this point he probably won't play [again this year].
"The most important thing is just making sure he's OK, and rest is probably the best treatment for this."
Mozeliak said there is no reason to think that Molina will require surgery to correct the problem.
"Another way to think about it is, if we were playing two weeks from now, he could be ready," he said.
Molina has been dealing with soreness in his knee since late August, when he suffered an injury in a game against the Nationals. Matt Pagnozzi has started the last two games in his stead, but Bryan Anderson will see some time behind the plate as well.
Matthew Leach is a reporter for MLB.com. Read his blog, Obviously, You're Not a Golfer and follow him on Twitter at @MatthewHLeach. This story was not subject to the approval of Major League Baseball or its clubs.