Cardinals' Bullpen Battle Faces Uncertainty After O'Brien's Injury

Calf strain sidelines potential closer, complicating Cardinals' closer competition

Feb. 19, 2026 at 12:39pm

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St. Louis Cardinals pitcher Riley O'Brien has sustained a mild right calf strain, adding uncertainty to the team's bullpen battle as they look to replace former closer Ryan Helsley. O'Brien, who notched six saves last season, is one of several pitchers vying for the closer role, along with JoJo Romero and Matt Svanson. The injury could also impact O'Brien's availability for the upcoming World Baseball Classic.

Why it matters

The Cardinals' closer competition is wide open after the departure of Helsley, and O'Brien's injury complicates the team's plans to solidify the back end of their bullpen. The outcome of this battle could have significant implications for the Cardinals' success in the 2026 season.

The details

O'Brien incurred the calf strain while throwing a live bullpen session on Saturday and has not thrown off a mound since. While he says the injury is improving, its impact on his availability for the World Baseball Classic and the start of the regular season remains uncertain. The Cardinals have several other options to consider for the closer role, including Romero, who led the team with eight saves last season, and Svanson, a hard-throwing right-hander who has yet to record a save in the majors.

  • On Saturday, O'Brien sustained a mild right calf strain while throwing a live bullpen session.
  • As of Tuesday, O'Brien had not thrown off a mound since the injury.

The players

Riley O'Brien

A Cardinals pitcher who notched six saves with a 2.06 ERA last season, but is now dealing with a calf injury that could impact his availability for the World Baseball Classic and the start of the 2026 season.

JoJo Romero

A left-handed Cardinals pitcher who led the team with eight saves last season, and could be a leading candidate to take over the closer role.

Matt Svanson

A hard-throwing right-handed Cardinals pitcher who has yet to record a save in the majors, but could also be in the mix for the closer job.

Ryne Stanek

A 34-year-old free agent signee who the Cardinals hope can provide veteran leadership and depth to their bullpen, though he may not be the primary closer.

Oliver Marmol

The Cardinals' manager, who will be tasked with determining the team's closer and bullpen roles in the wake of O'Brien's injury.

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What they’re saying

“It felt better today than it did yesterday. Hopefully it's nothing too long-term.”

— Riley O'Brien

“I heard stuff here and there; mostly people sending me stuff and asking me. I think the biggest thing was not really caring about it at all.”

— JoJo Romero

“There are different ways of mixing and matching with what we have on the back end that could be effective. I think you can look at a combination of those guys, including Stanek, and know that you've got some real stuff coming at you, and you have different ways you can deploy it.”

— Oliver Marmol, Cardinals Manager

“Getting Stanek in the offseason, it will be nice to have kind of a veteran presence in the bullpen. I think there's a lot of talent. I think there are going to be a lot of opportunities. I think it's going to be a fun year for the bullpen.”

— Riley O'Brien

What’s next

The Cardinals will continue to monitor O'Brien's recovery and determine if he will be available for the World Baseball Classic. The team's closer competition will remain fluid throughout spring training as Marmol evaluates his options.

The takeaway

The Cardinals' bullpen battle has become more complicated with O'Brien's injury, but the team has several talented options to consider for the closer role. How Marmol manages this competition could have a significant impact on the team's success in the 2026 season.