The Cardinals’ deadline picture is starting to come into focus, but Riley O’Brien may be the name that adds the most intrigue.
St. Louis has been slumping lately, and while the club’s overall trade approach seems pretty clear, the list of possible movers could stretch beyond the usual suspects. Lars Nootbaar, Dustin May, Ryne Stanek and JoJo Romero have been mentioned as obvious candidates, but O’Brien has also emerged as a real possibility.
That makes sense. The All-Star closer has put together a strong first half, and his 26 saves rank near the top of the National League. He’s also sitting on a 3.50 ERA, which only adds to the appeal for teams looking to shore up the back end of a bullpen.
In The Athletic’s latest trade deadline big board, O’Brien was identified as a fit for two AL Central clubs: the Chicago White Sox and the Minnesota Twins. Both teams are battling for postseason spots in the American League, and both need help in relief.
“Among potential relievers, O’Brien is perhaps the most intriguing. The 2017 eighth-round draft pick pitched to a 2.06 ERA last season for St.
Louis, flashing an elite fastball and extension. A season later, the extension and velocity are still there, but the results aren’t.
Still, O’Brien largely limits hard contact and generates groundballs at a high level. That he won’t hit arbitration until 2028 and is controlled through 2030 makes him all the more fascinating.”
That kind of team control is a big part of why O’Brien stands out. The Cardinals could likely ask for more in return than they would for a rental, and that changes the conversation at the deadline.
At the same time, there’s a real case for moving him now. O’Brien is already 31, relievers can swing wildly from year to year, and this could be the moment when his value is at its peak.
If St. Louis waits too long, there’s a chance that window closes.
Still, the Cardinals aren’t under any obligation to deal him. The market is the market, and O’Brien’s value will probably draw attention from more than one team.
The White Sox and Twins both make sense as suitors, though Minnesota may be the cleaner fit if a deal is going to happen. The White Sox may not be in a position to give up top prospects, while the Twins are buying and could use a dependable late-inning arm to help them navigate the rest of the 2026 season and push toward the top of the AL Central.
However it plays out, O’Brien is one of the more interesting names to watch as the deadline gets closer.
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Holliday stands out as the sort of young talent that can reshape a roster timeline, while Kirby would almost certainly come with a steep acquisition cost if the Cardinals tried to make a serious run at him. Mayer and Detmers give the group more variety, and that is part of what makes this kind of deadline chatter so easy to follow and so hard to read. The Cardinals can dream on the upside, but as always with this time of year, getting from interest to actual movement is where the real uncertainty begins. [Read more 🡒]
Cardinals Just Made A Tough Call On A Fan Favorite Outfielder
The Cardinals spent the day reshaping their outfield picture with a move that signals both urgency and patience. Lars Nootbaar, long one of the more recognizable faces in the lineup, is on his way out after the club weighed his health concerns against the rise of younger outfield prospects in the organization.
In return, St. Louis added pitching depth, getting right-hander Daniel Eagen and left-handed reliever Sando Santana as part of a package that also includes a third player not yet reported. It is the kind of deal that can look sensible on paper for a team trying to balance present needs with future value, but the final shape of the return still has one more piece to come into focus. [Read more 🡒]