Wang, who is competing with Eric Stults, Cody Martin and Mike Foltynewiczfor the final opening in the rotation, gave up two singles in the first four innings but faced the minimum 12 batters thanks to a pair of double plays. He faltered slightly in the fifth, loading the bases with two outs on a hit and two walks before Arodys Vizcaino came in to get the final out.

"He got that sinker going," said Braves manager Fredi Gonzalez. "He did a nice job. We made some nice plays behind him, but he's been impressive, he really has. I'm watching guys who are competing and stepping up. Remember when we talked about guys playing so well we have to make some tough decisions? They're doing it. They're really doing it."

With Yadier Molina on third and Anna on first with nobody out in the seventh inning, Cardinals second baseman Kolten Wong hit a ground ball to Joey Terdoslavich at first. Terdoslavich ran straight at Molina, tagged him out and then reached down to tag Anna as he was sliding into third. Just your typical 3-unassisted double play at third.

Mike Matheny appreciated the oddity but said Anna should have been going for third all the way. He went on to praise how well Anna has played recently.

"He looks to me like one of those grinder-type players that's going to do a lot of things right," the Cardinals' manager said.

Wainwright had been recovering from an abdominal strain suffered on Feb. 16. So there was a hold-your-breath moment in the second when Braves catcher John Buck topped a slow roller to the third-base side of the mound that Wainwright made a lunging grab for.

"I was screaming," Matheny said. "Typically we're yelling at guys, 'Get over' on anything hit on the ground. As soon as he jumped off the mound, I started yelling at him to stop. Of course, that was like harnessing the wind."

The suspense didn't last long. Wainwright easily retired the next two batters and completed four shutout innings with no problem.

He scattered four hits with one walk and three strikeouts. The only time the Braves got a runner past first came with two outs in the first on back-to-back singles by Jace Peterson and Freddie Freeman. Wainwright threw 64 pitches, 41 for strikes.

The Cardinals fielded a lineup that, with the exception of Peter Bourjos in center field instead of Jon Jay, could well be the one Matheny uses for the nationally televised regular-season opener against the Cubs on April 5.

Up next for Braves: Shelby Miller will attempt to extend his recent success when the Braves host a Tigers split squad on Sunday at 1:05 p.m. ET. Since recording just one out in his Grapefruit League debut, Miller has allowed just one run over seven innings. The game will be broadcast live on MLB.TV and Fox Sports South.

Paul Hagen is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.

The Taiwanese pitcher, 33, played for the Rockies in 29 games from 2003-05, appeared in 21 games for the Dodgers in 2007, was involved in a game-fixing scandal back in his native Taiwan in 2009, ran a barbecue restaurant and, suddenly, was signed to a Minor League contract by the Dodgers before Spring Training with no invitation to Major League camp.

But he's been added to the squad several times this spring as a backup, been given the ball in two games, and has been lights out, including on Sunday, when he struck out two in 1 2/3 perfect innings, hitting 96 mph on the radar gun.

Early in camp, Tsao's mere presence led to all kinds of jokes, but the conversation is turning serious enough for manager Don Mattingly to say he left Tsao in an extra inning Sunday so he would face the top of the Mariners' batting order. He got Austin Jackson on a fly out, struck out Justin Ruggianoswinging and Robinson Cano looking.

"His stuff is good," said Mattingly. "I kind of left him in there for a shot at Cano and those guys. He's been interesting to watch."

And to catch.

"First time I ever saw him," said catcher Yasmani Grandal. "He gives me a lot of options. He has a back-door breaking ball. And I didn't know he threw that hard."