The Cardinals and Red Sox are back at it.
On Tuesday, Andrew Parker of SoxProspects.com reported that St. Louis has acquired left-hander Eduardo Rivera from Boston in exchange for minor league right-hander Juan Garcia.
"Another Red Sox trade: LHP Eduardo Rivera has been traded to the St. Louis Cardinals in exchange for minor league RHP Juan Garcia, I’m told," Parker wrote.
Rivera brings a profile the Cardinals clearly found appealing. He stands 6-foot-7, weighs 237 pounds and works with a fastball that can flirt with triple digits. He’s also only 23 and already has a big league debut under his belt after appearing in four games for Boston in 2026.
His major league results were rough - a 6.30 ERA - but the minors told a different story. Rivera posted a 2.59 ERA with a 71-to-30 strikeout-to-walk ratio over 55 2/3 innings in 26 games, and in Triple-A he logged a 2.96 ERA across 24 appearances, three of them starts.
His usage split shows how Boston handled him last season: three starts in four major league outings, and five starts in 26 total minor league appearances.
For St. Louis, the appeal is obvious.
Rivera gives the club a big left-handed arm who could fit in the bullpen right away, though the Cardinals could also look at him as a rotation option. The more likely path, though, is relief work.
He’s still technically a rookie, which means there’s time and control left for the Cardinals to work with.
The price was a young arm with a long way to go. Garcia is 18 and made 11 starts in the Dominican Summer League in 2026, finishing with a 4.40 ERA in 43 innings.
He’s still a lottery ticket at this stage, while St. Louis gets a pitcher who can help in the majors now.
In Other News...
Cardinals Have More Riding On JJ Wetherholt Than Fans Realize
Major League Baseballs Rookie of the Year race now has a Cardinals angle worth watching, with second baseman JJ Wetherholt among the three National League finalists alongside Reds infielder Sal Stewart and Mets outfielder Carson Benge. The award is decided by Baseball Writers Association of America voters, and Wetherholts first big league season gave St. Louis plenty to point to beyond the usual rookie buzz, including his defensive work and his impact on the bases.
There is also a little more at stake for the Cardinals than just the trophy itself. If Wetherholt wins the award or even finishes as an MVP finalist, St. Louis could come away with a draft pick, which gives this race a front-office wrinkle as well as an on-field one. Stewart and Benge both put up strong offensive numbers, so the final vote will come down to how writers weigh production, all-around value and the kind of season Wetherholt put together in his debut. [Read more 🡒]
Cardinals May Have A Low Cost Answer To Their Lefty Problem
The Cardinals have been weighing a familiar roster fix as they look for ways to balance out their lineup against left-handed pitching, and the search has centered on a right-handed bat who can handle first base. Alec Burleson has given them a useful lefty option, but the need for a complement on the other side has kept that spot on the radar as St. Louis continues sorting through its offseason priorities.
Ryan Mountcastle has surfaced as one possible fit, bringing the kind of power production that once made him an appealing bat in Baltimore. Injuries slowed him last season, which adds some risk to the idea, and the Cardinals still may lean more heavily toward pitching help as they keep building out the roster. Even so, offensive upgrades remain part of the conversation, and first base looks like one place where a relatively modest move could make a real difference. [Read more 🡒]
Cardinals Take A Low-Risk Bullpen Shot With Real Upside
The Cardinals have added another arm to their bullpen mix, acquiring Rivera from the Red Sox in a move that comes with little downside and a chance for meaningful payoff. Boston had designated Rivera for assignment because of roster constraints, even though his track record has been uneven in the majors and more encouraging in the minors, which made him the kind of available pitcher a team like St. Louis can circle back to when it is looking for depth without paying a premium.
For the Cardinals, the appeal is obvious: a fresh bullpen option with some real upside if the change of scenery helps unlock more consistency. Boston, meanwhile, gets 18-year-old Garcia in return, a young pitcher who has already begun his pro career in the Dominican Summer League, underscoring how both clubs approached the deal with different timelines in mind. [Read more 🡒]