Rosenthal threw a scoreless inning on July 18 in his first appearance with the Cardinals, and posted a 4.50 ERA in four outings before having been optioned to Triple-A on Aug. 1. Cardinals manager Mike Matheny said there is no particular plan in place for how the club intends to use Rosenthal.
"He gives us another right-handed arm, obviously, but also gives us some depth when you have a pitcher that can go long with high pitch counts," said Matheny. "He's still in the process of working himself into tougher innings, but right now he's healthy and ready to go and we're excited to have him back."
Rosenthal made the jump straight from Double-A to the Majors earlier this season, and was 8-6 with a 2.78 ERA in 17 starts with Springfield. His two starts with Triple-A Memphis after a brief stint in the big leagues were the first of his career.
Rosenthal pitched well in his Triple-A debut on Aug. 3, allowing one run over five innings. But he was roughed up for six runs on five innings in his second outing on Aug. 8. In that second game, Rosenthal issued a leadoff walk, hit two batters and gave up three singles in a four-run first inning.
"There's guys that have had more time and more experience," Rosenthal said of Triple-A. "It was a little different of an environment because guys are a bit more mature. But it's still the same game. I just tried to work hard and keep developing there."
Matheny called Rosenthal's time in Triple-A, "great learning experiences." Rosenthal added he's still sharpening up his pitches and learning the mentality and routine required to pitch at the highest levels.
Rosenthal said he feels more comfortable than the last time he was called up to St. Louis, and will try to prepare himself the same way he always has for whatever role he plays in the Cardinals' bullpen.
"I had a little bit of experience, a little taste of it," Rosenthal said. "So I'm trying to come back and help put us in a position to win and keep working hard. Just come up here and whenever I get the call try to go in there, put up a zero and give us a chance."