Explained: Intercostal injury that sidelines Yankees rookie Spencer Jones

Intercostal strain sends Yankees rookie Spencer Jones to the injured list.

NEW YORK — The New York Yankees have taken an unexpected hit to their farm system. Outfield prospect Spencer Jones landed on the seven-day injured list with what manager Aaron Boone confirmed Wednesday is an intercostal injury.

Jones, the No. 2 prospect in the Yankees’ system according to MLB Pipeline, was scratched from Double-A Somerset’s lineup on Sunday. He did not appear in Tuesday’s game and was subsequently placed on the injured list. Boone didn’t offer a specific timeline, only stating, “I don’t know how long,” while adding he’s unsure how the injury occurred.

The injury is particularly frustrating considering Jones’ strong offensive start to the season. Through 25 games, the 23-year-old was slashing .228/.372/.554 with nine home runs, 16 RBI, and six stolen bases. While his batting average remained modest, his on-base percentage and power numbers showed continued development. His 20 walks against 41 strikeouts also suggested a more disciplined approach at the plate — a welcome sign after recording 200 strikeouts last year, the most ever by a Yankees minor leaguer.

Understanding intercostal injuries

An intercostal injury affects the muscles situated between the ribs — the intercostal muscles — which play a vital role in the expansion and contraction of the chest during breathing. These muscles also help stabilize the upper body during movement, making them essential for athletes who swing, twist, or rotate their torso — actions frequent in baseball.

Strains or tears in these muscles often occur due to overexertion, sudden twists, or direct impact to the ribcage. Given Jones’ role as an outfielder and power hitter, any excessive rotational movement, such as a hard swing or dive, could have triggered the strain.

Symptoms of an intercostal muscle strain typically include:

• Sharp pain in the rib or upper back region
• Muscle stiffness and spasms
• Pain that worsens during deep breathing, coughing, or twisting
• Tenderness between the ribs
• Decreased range of motion

These injuries are commonly confused with upper back issues or even lung problems. However, pain localized between the ribs without respiratory illness usually points to muscular involvement rather than a more systemic condition.

Common causes in baseball

In a sport that demands constant trunk rotation — especially during swings or throws — baseball players are no strangers to intercostal injuries. Several high-profile players, including Aaron Judge and Bryce Harper in past seasons, have missed weeks due to similar strains.

For younger players like Jones, who are still refining their swing mechanics and adjusting to high-intensity workloads, the risk may be even higher. A sudden increase in torque or a tweak during a throwing motion can lead to overstretching the muscle fibers, resulting in minor to severe tears.

Diagnosis and recovery timeline

Diagnosis typically involves a physical examination to test for pain during movement and to rule out rib fractures. Doctors may also use imaging like MRI to assess the extent of the strain and to ensure there’s no structural damage.

While not typically season-ending, intercostal muscle strains can be slow to heal. Recovery depends on the severity:

• Mild strain: 1 to 2 weeks
• Moderate strain: 3 to 6 weeks
• Severe tear: 6+ weeks, especially if the injury involves deep muscle layers

Treatment often begins with rest, ice, and anti-inflammatory medications. Once acute pain subsides, physical therapy focused on breathing techniques, stretching, and core stabilization becomes essential. Athletes must avoid premature return to activity, as re-aggravation is common.

A minor setback in a promising climb

The timing of Jones’ injury is particularly unfortunate as he appeared poised for a breakout in his second full season at Double-A. A first-round pick in 2022 out of Vanderbilt, Jones has primarily played center field and drawn comparisons to Aaron Judge for his 6-foot-6 frame and raw power.

In 2024, he slashed .259/.336/.452 with 17 homers, 78 RBI, and 25 stolen bases — production that positioned him on the brink of a Triple-A promotion. The Yankees hoped he would continue refining his plate discipline and contact rates in 2025, and his early-season slugging percentage suggested real progress.

Now, the organization will need to exercise caution to ensure this injury doesn’t derail a crucial year in his development.

What’s next for the Yankees?

While the Yankees‘ major league roster remains deep in outfield talent, with Aaron Judge, Cody Bellinger, Jasson Domínguez, and Trent Grisham all factoring in, Jones’ long-term outlook remains critical to the club’s future plans.

Barring complications, a return in late May or early June appears realistic. But with soft-tissue rib injuries, every movement — from a deep breath to a full swing — can affect healing.

If there’s one silver lining, it’s that the injury occurred early in the season. Jones, with the proper rehab, still has time to make up lost ground and continue pushing toward a potential late-2025 call-up.

As for now, the Yankees will keep a close eye on one of their most promising prospects, and hope his intercostal strain is just a short detour on an otherwise rising path to the Bronx.

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