"I think he's just beat down like a lot of guys are with the fact that we're not playing how we should play, how we want to play and how he wants to play," Matheny said. "I think it's more of just a frustration that is overbearing and overwhelming when you want to win so badly and you want to do your part so badly and none of it is working.
"I see he cares so much that it's beat him down. Anybody is susceptible to just being fried sometimes. … You take a guy with natural leadership characteristics, he wants to be the guy to make it all happen."
Lately, Molina has had a particularly tough time making much happen at the plate. He was hitting .330/.360/.477 entering the Cardinals' most recent homestand. His average has since dropped to .293, as Molina has hit .128 over the team's past 11 games, of which the Cardinals have won just three.
Molina had just one extra-base hit during that stretch and has hit into a fair amount of bad luck.
"We've been trying to help him push and grind through this," Matheny said. "At some point, you have to take a break and take a breath. It's investing into the future. That adds to his frustration, too, because when things aren't going well, the first thing he wants to do is jump in and keep fighting. "
Matheny said that he considered playing Molina at first base Saturday before eventually deciding that a full day off could be more beneficial. He had encouraged Molina to limit his pregame work, too, though the catcher was out taking batting practice with the club.
The Cardinals have been more proactive this season in giving Molina days off to help keep him physically strong deep into the season. That included reducing the amount of catching he did even in Spring Training. That preventive work seems to have benefited Molina from a physical standpoint thus far.
Jenifer Langosch is a reporter for MLB.com. Read her blog, By Gosh, It's Langosch, and follow her on Twitter @LangoschMLB. This story was not subject to the approval of Major League Baseball or its clubs.