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Riley O'Brien: The Secret Weapon in St. Louis Bullpen
16 Apr
Summary
- Riley O'Brien boasts a 0.00 ERA with an 11-to-0 strikeout-to-walk ratio.
- He is under team control through the 2030 season.
- O'Brien is currently the club's closer and performing exceptionally well.

The St. Louis Cardinals' bullpen has struggled, holding the 25th-ranked ERA in the league at 5.30. However, a standout performer has emerged in relief pitcher Riley O'Brien.
O'Brien has been exceptional this season, maintaining a 0.00 ERA with an 11-to-0 strikeout-to-walk ratio over 10 1/3 innings. He has not allowed an earned run or a single walk.
His advanced metrics are equally impressive, placing him in the 99th percentile for expected ERA and groundball rate. O'Brien's performance solidifies his role as the team's current closer.
Adding to his value, O'Brien is under team control through the 2030 season, offering St. Louis a stable and cost-effective solution at the closer position.