ST. LOUIS — St. Louis Cardinals manager Mike Matheny said Sunday that negative body language from pitcher Lance Lynn will not be tolerated.

Lynn was visibly perturbed during his abbreviated assignment against Pittsburgh on Saturday.

Lynn struck out eight in 4 1/3 innings, but allowed three runs (earned) on four hits and walked three. He was even angrier after his outing, leaving the field and making a beeline for the clubhouse.

"He should have been (upset)," Matheny said. "That's not the kind of game he wants."

And it's not what the Cardinals want from Lynn, not only in terms of numbers, but in competitive disposition.

Matheny later spoke about the topic with Lynn, who got a no-decision in the Cardinals' 5-4 victory.

"The bigger message, really, was that's not how he needs to respond when games start to go in that direction," Matheny said. "That's just part of the maturing process."

Matheny said Lynn's emotions "had as much to do with his exit as anything else."

"You just can't let things spiral," Matheny said. "We can't help but see (the negative body language). The thing is, that leads to how the umpire views the strike zone and views you and views our team. That's how the other team's opposition sees that they (notice) a chink in the armor. No good comes from that.

"It's just part of the growing process of a young starter. The first thing I told him was, 'I don't think he has a bigger fan ... than I am.' So with that being said, he needs to be able to understand when we come at him with stuff like this, it's for his betterment.

"He needs to pay close attention, because there's little things he's missing in his game. Once he puts it all together, to me, I see a really good, long career. But there's still some things there he needs to fix."

Lynn, who is 13-5 with a 3.73 ERA in 24 starts, acknowledged his emotional issues after the game.

"When you're out there, sometimes the emotions overtake you, and you can't let that happen," Lynn said. "I was able not to give up the big inning. But some of the emotions, I'm just trying to do all I can to help us beat the team that is ahead of us.

"I was fighting all day, and I need to make sure I don't let (the emotions) be seen as much."

Kelly to pen

Jaime Garcia's return to the rotation Sunday in a 6-3 loss in 19 innings to the Pirates put rookie Joe Kelly in the bullpen.

Matheny wasn't sure before the game what type of role Kelly will fill, but Kelly gave the Cardinals 5 2/3 innings and threw 87 pitches, allowing a 17th-inning run before St. Louis tied the game again in its half of the inning.

Kelly proved he can work in long relief, but there don't figure to be many other 19-inning games and Cardinals starters have been pitching into the late inning. St. Louis already has two quality right-handed setup men in Edward Mujica and Mitchell Boggs.

"Preferably, I don't want to see him in the third or fourth (inning), but he's going to be ready," Matheny said of Kelly. "I have no preconceived idea on what kind of use we're going to have for him.

"We'll just wait and see how it all plays out. Because of how he's throwing, I'm not afraid to use him."

Garcia's return also sent Trevor Rosenthal back to Class AAA Memphis, where he will be used in the rotation.

"We saw the talent and the makeup," Matheny said. "He can certainly be an impact player for us in the future."

Rebuilding hope

Matheny will be joined by Cardinals President Bill DeWitt Jr., General Manager John Mozeliak and hitting instructor Mark McGwire, among others, on Monday in Joplin, Mo.

The group, which will also include Vice President of Community Relations Mike Hall, of Belleville, will help build homes for the city that was devastated by a tornado in May 2011.

Matheny said he is looking forward to the experience. He enjoys carpentry and said it was a hobby during his playing career.

"I've done rough carpentry and framing. I've done finished carpentry and trim. I've built furniture from scratch," Matheny said. "I've spun table legs and made rocking chairs. I like woodwork."

Matheny said his family still has a cherry wood rocking chair he made for his wife, Kristin, when she was pregnant with her son, Tate, now a freshman at Missouri State.

"I spun everything and hand-carved it all," said Matheny, who has a workshop at his St. Louis county home. "I don't do a lot of it anymore. I don't have the time as the kids have gotten older."

Contact reporter David Wilhelm at dwilhelm@bnd.com or 239-2665. Follow him on Twitter: @DavidMWilhelm.