Teheran struck out six in five hitless innings and lowered his ERA to 1.29 on Tuesday in the Braves' 12-3 victory.
"He's been great," Braves manager Fredi Gonzalez said of the 22-year-old right-hander. "He's matured. He's polished himself up a little bit and he's looking good."
St. Louis went 29 consecutive innings without a run before scoring three times in the seventh against reliever Luis Avilan.
Teheran has allowed four hits in 14 innings over four starts and has 18 strikeouts and four walks. Of his 64 pitches against the Cardinals, 44 were strikes.
"Julio's got some weapons," Gonzalez said. "The more he goes out there the more he's impressing me with his changeup and a two-seamer that comes back on the lefties."
Teheran struggled last spring training when given a chance to win a rotation spot and then went 7-9 with a 5.08 ERA at Triple-A Gwinnett.
"He's up to three, maybe 3 1-2 pitches now," Gonzalez said. "I wouldn't have called him more than a one-pitch pitcher last year."
Still, Gonzalez wasn't prepared to announce a decision on his fifth starter.
He's too young for me to say that," the manager said.
Mujica gave up five runs and six hits -- four for extra bases -- in the seventh as his ERA ballooned to 15.00. The three runs off Motte in the eighth were unearned.
Evan Gattis had doubles off both Mujica and Motte, driving in three runs. Freddie Freeman was 2 for 2 and drove in two runs.
Westbrook allowed two runs, three hits, three walks and a hit batter in four innings.
"The movement is there, I've just got to get the ball in the zone," said Westbrook, who won 13 games last year before an oblique strain Sept. 8 ended his season. "It's only my third start. I'll hone it in."
Cardinals manager Mike Matheny, who had back surgery Monday in St. Louis for a bulging disk, may be able to rejoin the team for Thursday's game with the Braves in Jupiter. The Cardinals are off on Wednesday. ... The Braves made 10 cuts, with seven of the players non-roster spring invitees LHP Yohan Flande, LHP Ryan Buchter and RHP Gus Schlosser, C Louis De La Cruz, C Braeden Schlehuber and C Jose Yepez, and 3B Joe Leonard. Optioned to the minors were RHPs Cory Rasmus (Triple-A), Juan Jaime (Double-A) and Aaron Northcraff (Double-A). ... The Cardinals optioned RHP Kevin Siegrist to Triple-A and returned LHP Barret Browning and C Cody Stanley to the minor league complex.
Rockies rally, win in 10th as Dodgers' bullpen woes continue
— Trevor Story homered and drove in the go-ahead run in the 10th inning as the Colorado Rockies took advantage of the Dodgers' recent bullpen woes, beating Los Angeles 9-6 Friday night.
Blackmon launches 2-run homer in 10th
Charlie Blackmon extends the Rockies' lead with a two-run home run in the 10th inning vs. the Dodgers.
Hilliard's homer gives Rockies lead in 9th
Sam Hilliard finishes off the Rockies' comeback with a solo home run in the top of the ninth vs. the Dodgers.
Raleigh, Torrens hit back-to-back HRs, Mariners top A's 4-3
— Cal Raleigh and Luis Torrens hit back-to-back homers, Dylan Moore scored the go-ahead run on consecutive wild pitches and the Seattle Mariners beat the Oakland Athletics 4-3 on Friday night.
Cal Raleigh demolishes 1st career HR, Mariners go back-to-back
Cal Raleigh sends his first big league home run 444 feet as the Mariners hit back-to-back dingers in the second inning of a 4-3 win over the A's.
Reynolds HR, Pirates stop 4-game skid, beat Giants 6-4
— Bryan Reynolds homered, Adam Frazier drew a bases-loaded walk to force in the go-ahead run in the seventh inning when Pittsburgh scored three times without a hit, and the Pirates beat the San Francisco Giants 6-4 on Friday night.