Flaherty will start Sunday against the Brewers, Jenifer Langosch of MLB.com reports.

EDGE Analysis

Flaherty will get the nod in the finale as Carlos Martinez gets a head start on his offseason. It will be Flaherty's fifth career start at the big-league level. The 21-year-old has struggled to this point, but he was excellent at Triple-A Memphis before getting the call and looks like a potential mid-rotation starter in his peak years.

Flaherty will slide into a bullpen role for the rest of the 2017 season, Derrick Goold of the St. Louis Post-Dispatch reports.

EDGE Analysis

Flaherty struggled mightily during his previous start against the Reds on Tuesday, allowing two earned runs in just two innings of work off three hits and a walk. The top prospect will see time in a relief role for the last few weeks, while John is set to take his place in the rotation.

Flaherty went only two-plus innings in Tuesday's start against the Reds, allowing two runs on three hits and a walk with two strikeouts. He didn't factor into the decision.

EDGE Analysis

Manager Mike Matheny pinch hit for him in the top of the third, showing a distinct lack of faith in the rookie right-hander. Of course, Flaherty hasn't earned it, having posted a 6.46 ERA and 1.70 WHIP over his first four big-league starts -- a far cry from his impeccable work in the minors this season (2.18 ERA, 1.04 WHIP, 8.9 K/9 in 25 starts split between Double-A and Triple-A). His future's bright, but it doesn't look like owners will get much of anything from Flaherty in what remains of this season even if he continues to hold a rotation spot.

Flaherty will start Tuesday's game against Reds and could remain in the starting rotation for the remainder of the season, Jenifer Langosch of MLB.com reports.

EDGE Analysis

Flaherty hasn't had much success in his first three starts with the Cardinals since being recalled on Sept. 1, as the 21-year-old has allowed nine earned runs over his first 13.1 big-league innings. Despite his early struggles, he may get the opportunity to finish the season in the starting rotation, as the Cardinals reported Sunday that Adam Wainwright (elbow) will be shifted to the bullpen following his activation from the disabled list this week.

Flaherty (0-1) took the loss against the Reds on Wednesday, giving up three runs on four hits and two walks over 4.1 innings while striking out three.

EDGE Analysis

The rookie right-hander has yet to throw more than five innings in any of his three big-league starts, and while Flaherty's 13:7 K:BB in 13.1 innings shows promise, his 6.08 ERA isn't helping the Cards stay in the NL playoff chase. If Adam Wainwright is able to return to the rotation next week, expect Flaherty to shift to the bullpen.

Flaherty, who is scheduled to start Wednesday's contest against the Reds, does not have a defined innings limit as of yet, Jenifer Langosch of MLB.com reports. "The good thing about the way Jack has pitched this year is he's thrown a lot of innings without facing a lot of batters or throwing a ton of pitches because he's been so effective," general manager Michael Girsch said. "We don't have a date or a number in mind."

EDGE Analysis

The rookie has now thrown 157.2 innings across three levels of the Cardinals organization this season, which easily eclipses his 2016 total of 134 frames. Flaherty had originally been scheduled to not go beyond a 20 percent increase over last season's total in 2017, but the team now appears willing to be more flexible in that regard. The 21-year-old right-hander has a 6.00 ERA and 10:5 K:BB over nine innings across his first two big-league starts.

Flaherty allowed one run on three hits and four walks over five innings Wednesday while striking out four but came away with a no-decision in a 3-1 win over the Padres.

EDGE Analysis

The rookie had trouble finding the strike zone at times, but this was still a better outing for Flaherty than his debut last Friday. The Cardinals have a couple of days off coming up in their schedule, and with Adam Wainwright set to rejoin the rotation Monday, the 21-year-old will likely be shuffled back into the bullpen over the final weeks of the season. Expect Flaherty to make a strong case for a regular spot in spring training next year, however.

Flaherty was called up ahead of his start against the Giants on Friday, MLB.com's Jenifer Langosch reports.

EDGE Analysis

Flaherty will make his major-league debut in San Francisco in the wake of Mike Leake's departure to the Mariners. The 21-year-old has made 15 starts at the Triple-A level this season with Memphis, compiling a 2.74 ERA and an 85:24 K:BB in 85.1 innings. Moving forward, Flaherty could wind up getting another opportunity to start depending on Adam Wainwright's (elbow) health, and how he performs against the Giants.

Flaherty will make his big-league debut against the Giants on Friday, MLB.com's Jenifer Langosch reports.

EDGE Analysis

With the departure of Mike Leake via a trade to Seattle on Wednesday, Flaherty will take his place and start against the Giants on Friday. During 15 outings with Triple-A Memphis this season, Flaherty has posted a 2.74 ERA and 1.14 WHIP with a 85:24 K:BB in 85.1 innings. The right-hander is a top-five prospect in the Cardinals' system, and may continue to earn starts throughout the rest of the 2017 season, especially if Adam Wainwright (elbow) cannot seem to regain full health. Over Flaherty's five August appearances, the 21-year-old has allowed just seven earned runs in 31 innings, and compiled a 4-1 record with 29 strikeouts.

Flaherty (4-1) recorded nine strikeouts over seven scoreless innings in Triple-A Memphis' win over Tacoma on Sunday. He allowed just two hits and a walk.

EDGE Analysis

The 21-year-old right-hander has a 2.83 ERA, .215 BAA and 1.09 WHIP in 60.1 Triple-A innings, and as per William Boor of MLB.com, he's given up one earned run or less in five of his last six starts. Flaherty also boasts an excellent 65:18 K:BB in Memphis and appears ver close to being big-league ready.