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Cardinals' Secret Weapon: O'Brien Dominates
5 Apr
Summary
- Riley O'Brien emerged as the Cardinals' best-kept secret.
- He posted a 2.06 ERA across 42 games last season.
- His fastball averages over 98 mph with a strong three-pitch arsenal.
The St. Louis Cardinals have officially committed to a rebuild, signaling a new era with Chaim Bloom taking over as president of baseball operations. This strategic shift involved trading key players, with the goal of bolstering the team's young core and enhancing its farm system.
Amidst this transition, reliever Riley O'Brien has been highlighted as the team's "best-kept secret." Kelly noted O'Brien's remarkable 2.06 ERA over 42 games in the 2025 season. He has continued his strong performance into the current 2026 season, with several scoreless appearances.
O'Brien's effectiveness is supported by an impressive fastball averaging over 98 mph, complemented by a sweeping slider and a distinct slider. He has yet to allow a barrel this season, ranking highly in metrics like hard-hit percentage and ground ball percentage, generating numerous opposing swings outside the strike zone.
