Bringing the heat: Cards' No. 9 prospect reaches 102 mph in dominant Double-A debut
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Summer might be in its waning days, but all it takes to turn the heat back up is a few Brandon Clarke fastballs.
The Cardinals’ No. 9 prospect twirled four brilliant innings in his Double-A debut, striking out seven and topping out at 102 mph during Springfield’s 5-3 win over Arkansas at Route 66 Stadium.
Clarke surrendered a first-inning single and fanned five consecutive batters at one point. The 23-year-old walked just one -- an eye-opening fact considering he entered his outing walking more than five batters per nine innings this season. But Clarke was efficient against the Travelers, throwing 36 of his 62 pitches for strikes while generating 12 whiffs on 26 swings (46.2 percent).
The southpaw benefited from another homer from red-hot Rainiel Rodriguez (STL No. 1/MLB No. 18). The 19-year-old has gone deep twice in his past three games and is slashing .323/.413/.570 with 26 roundtrippers and 86 RBIs across two Minor League levels this season.
It proved more than enough for Clarke, who was promoted from High-A Peoria earlier this week after putting together a dominant five-start stretch for the Chiefs, striking out 27 in 18 1/3 innings and posting a 3.44 ERA with a .145 average-against.
Clarke entered the season as one of the Cardinals’ more fascinating pitching prospects thanks to his ability to consistently hit triple digits with his fastball, but injuries delayed his progress.
He began 2026 on a slow progression after a blister plagued him for much of last season. That ailment limited Clarke to 38 innings in his first pro campaign, but injuries have become an unfortunate part of Clarke’s young career.
He underwent Tommy John surgery in high school and his collegiate tenure at Alabama was marred by thoracic issues in his left shoulder. Boston still saw enough upside to take him in the fifth round of the 2024 Draft. The Cardinals acquired the Virginia native last winter in the Sonny Gray deal.
Despite the methodical pace of his season, Clarke has not disappointed when on the mound. His defining moment came during a July rehab appearance for Single-A Palm Beach, when he unleashed a 103.1 mph sinker to become the second left-handed pitcher (Aroldis Chapman) to exceed 103 mph in the pitch-tracking era. Clarke topped 100 mph 16 times during the 36-pitch outing.
But the velocity is only part of the appeal.
Clarke has developed a devastating upper-80s mph slider that has quickly become his best secondary weapon. The 70-grade offering generated a ridiculous 63 percent whiff rate in 2025.
Because of his various maladies, Clarke’s pro résumé is still being written, but that is precisely what makes the 6-foot-4, 220-pounder so intriguing. Every time he takes the mound, his raw arsenal offers tantalizing glimpses of an unlimited ceiling.