Talk about a leap of faith!

The St. Louis Cardinals have promoted AA right-handed pitcher Trevor Rosenthal to the majors to help a bullpen that has been struggling.

Here’s a little about the move from the Post-Dispatch’s Derrick Goold:

Rosenthal, who will wear No. 64, is expected to join the team in Milwaukee in time for tonight’s game at Miller Park.

Rosenthal, a 22-year-old righthander, has been one of the organization’s most consistent starting pitchers this season. He earned a spot in Double-A Springfield’s rotation out of spring training and is 8-6 with a 2.68 ERA in 17 starts in the Texas League. Rosenthal has struck out 83 batters and walked 37 in 94 innings.

The righty’s fastball sits from 91 mph to 95 mph, and it has natural sink without sacrificing power. Rosenthal hit 98-mph with a fastball during last year’s Midwest League playoffs.

Rosenthal has won his past three starts and on Thursday he pitched six shutout innings with four strikeouts.

To make room in the majors for the Cardinals, the club must make two moves — one for the 25-man roster and another on the 40-man roster. Maikel Cleto has been optioned to Class AAA to make room on the 25-man roster. To make room on the 40-man roster for Rosenthal, the Cardinals have moved Jaime Garcia to the 60-day disabled list.

The Cardinals had a full 40-man roster on Monday morning, and both of the team’s long-term absences — Chris Carpenter and Kyle McClellan — had already been moved to the 60-day disabled list. Newly signed lefty Brian Fuentes will have to be added to the 40-man roster before he is promoted to the majors.

Garcia will be eligible to come off the 60-day disabled list in early August.

A year ago, Rosenthal was the ace for Low-A Quad Cities as the River Bandits blitzed for the Midwest League title.

Rosenthal earned an invite to major-league spring training and quickly grabbed available major-league innings because of how he impressed the major-league staff. Rosenthal was viewed as a young pitcher with a live arm, but his poise and command made him an option for the big-league team in exhibition games. He has been a starter in the minors since 2010, his first full season as a pro.

Rosenthal is from Lee’s Summit, Mo.

Good luck to Trevor and here’s hoping he’s just what the bullpen needs to pull it together!

Miranda Remaklus is lead St. Louis Cardinals contributor to Aaron Miles’ Fastball. She’s also lead writer for Aerys Offsides in the NFL section. Follow her on Twitter, @missmiranda.