Cubs’ Cade Horton Placed on 15-Day IL, Undergoing Arm Tests

Cubs rookie Cade Horton landed on the 15-day injured list with forearm tightness after his second start of 2026. That move set off a bunch of roster shuffles as Chicago tries to navigate some early-season pitching uncertainty.

This post takes a look at what happened on the mound, how the Cubs are responding medically and on the roster, and what these decisions might mean for Horton’s timeline and the pitching staff as a whole.

Cade Horton’s setback and Cubs’ rotation depth

The Cubs are trying to be cautious, but it’s a tough blow for their young right-hander. Horton first noticed wrist tightness during his outing, but it shifted to his forearm and got worse.

He called for relief after throwing a 93.8 mph fastball—definitely down from his usual speed. With the pain sticking around, he left the game for Colin Rea, and the Cubs put him on the 15-day injured list.

Horton, just 24, had a breakout rookie year with an 11-4 record and a 2.67 ERA. This injury is a frustrating pause in what looked like a fast rise.

He went back to Chicago for more tests since the discomfort just wouldn’t go away. The Cubs’ medical staff started gathering opinions and running evaluations to figure out the best plan for Horton’s recovery and long-term health.

Meanwhile, Chicago scrambled to steady the rotation and bullpen, trying to keep workloads and schedules on track while they wait for more clarity on Horton.

Injury timeline and medical update

Horton’s trouble started with wrist tightness and moved to his forearm, leading to the IL stint. Doctors are still evaluating the severity as they go through imaging and other tests.

Manager Craig Counsell said they’ll need a few days to get all the medical opinions before making any announcements about Horton’s return. The Cubs aren’t taking any chances with a pitcher this early in his big-league career.

Riley Martin and the Cubs’ roster flexibility

With Horton out, the Cubs called up left-hander Riley Martin from Triple-A Iowa to help patch things up. Martin, 28, was a sixth-round pick in 2021 out of Quincy University and has been quietly building a strong minor-league resume.

Last season in Iowa, he went 6-2 with a 2.69 ERA. Across 174 minor-league games, he’s put up a 24-13 record and a 3.76 ERA. That’s not nothing, especially for a guy who started in Division II.

• Riley Martin — recalled from Triple-A Iowa to give the Cubs some starting depth and maybe a longer look in the bullpen.
• Ethan Roberts — added as the 27th man for the Cubs’ doubleheader, offering another short-term arm while Horton sits out.

The Cubs also brought up Ethan Roberts as the 27th man for the doubleheader, just to keep the pitching staff flexible in a tight schedule. Counsell’s comments about Martin show the Cubs really value homegrown pitchers—even if their road to the majors isn’t straightforward.

Martin’s path and what he offers the Cubs

Martin’s journey from Division II to the majors stands out. Counsell made a point to highlight it.

He’s been durable in the minors and seems able to slot into whatever role the Cubs need. They’ll be watching closely to see how his velocity, control, and minor-league success hold up against big-league hitters.

The road ahead for Horton and Chicago’s pitching plan

The immediate plan focuses on medical evaluation and a careful rehab process. The Cubs want to fill Horton’s innings with a mix of options while he recovers.

They’re trying to win games now, but they also need to protect a young pitcher who’s under a lot of scrutiny. In the next few days, team doctors and coaches will give more updates that could shift the return timeline.

Riley Martin’s call-up and Ethan Roberts’ bigger workload for the doubleheader will shape how the Cubs handle the rotation. If more shuffling comes up, those performances might really matter.

 
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