Riley O'Brien is poised to potentially step into a more prominent role within the Cardinals' bullpen as the team looks to open roster spots for younger talent. With the likelihood of losing established reliever Andrew Kittredge, O'Brien may be given opportunities to pitch in high-leverage situations, reflecting the Cardinals' shift towards a multi-year rebuild and focus on player development.

Riley O'Brien, a right-handed pitcher for the St. Louis Cardinals, was placed on the 15-day injured list due to a flexor tendon strain, further weakening their bullpen.

Riley O'Brien is a pitcher on the St. Louis Cardinals' roster for the 2024 season, adding depth and potential swing-and-miss ability to the bullpen.