MLB Spring Training Reveals Pitchers Adding New Weapons, Battling Injuries

From the Angels' Robert Stephenson to the Rangers' Jack Leiter, players are adapting arsenals and overcoming setbacks ahead of Opening Day.

Apr. 11, 2026 at 11:05pm

Got story updates? Submit your updates here. ›

A cubist, geometric painting depicting a baseball pitcher's motion broken down into sharp, overlapping planes of vibrant colors, conceptually representing the constant refinement and adaptation of pitching skills during Spring Training.Spring Training's experimental pitching reveals showcase the constant evolution of baseball, as players adapt their arsenals and overcome physical challenges.Angels Today

As baseball's Spring Training progresses, players across the American and National Leagues are making key adjustments to their pitching arsenals and overcoming various injuries. From the Angels' Robert Stephenson working to manage thoracic outlet syndrome to the Rangers' Jack Leiter adding a new cutter pitch, these revelations could have a major impact on the upcoming MLB season.

Why it matters

Spring Training is a critical period where players test new strategies, refine skills, and recover from injuries before the grueling regular season begins. The changes and challenges emerging now could foreshadow which teams and players will rise to the top in 2026.

The details

In the American League, Angels right-hander Robert Stephenson is determined to overcome thoracic outlet syndrome symptoms and right elbow inflammation, hoping to be ready for Opening Day after throwing bullpens without issues this spring. Rangers prospect Jack Leiter is adding a cutter to his repertoire, learning the pitch from Red Sox ace Garrett Crockett, which could boost his efficiency. Meanwhile, the Red Sox face potential absences with Patrick Sandoval and Kutter Crawford recovering from injuries, while top prospect Marcelo Mayer aims to add speed and adjust his swing. In the National League, Diamondbacks hurler Drey Jameson is focused on developing a changeup, while Marlins manager Don Mattingly plans to mix and match high-leverage relief roles.

  • Spring Training is currently underway, with Opening Day set for April 1, 2026.

The players

Robert Stephenson

A right-handed pitcher for the Los Angeles Angels who is working to overcome thoracic outlet syndrome and right elbow inflammation this spring.

Jack Leiter

A top pitching prospect for the Texas Rangers who is adding a cutter to his arsenal, learning the pitch from Red Sox ace Garrett Crockett.

Patrick Sandoval

A Boston Red Sox pitcher who may not be ready for Opening Day due to an injury.

Kutter Crawford

A Boston Red Sox pitcher who may not be ready for Opening Day due to an injury.

Marcelo Mayer

A top Boston Red Sox prospect who is aiming to add speed to his game and adjust his swing after a challenging debut.

Got photos? Submit your photos here. ›

What they’re saying

“I'm optimistic about managing my nerve issues and being ready for Opening Day, as I've been throwing bullpens without problems this spring.”

— Robert Stephenson, Angels RHP

“This new pitch could be the key to my success, helping me get quicker outs and improve efficiency.”

— Jack Leiter, Rangers Prospect

What’s next

As Spring Training continues, players will look to build on these adjustments and overcome any lingering injuries in preparation for the start of the 2026 MLB season on April 1.

The takeaway

The revelations emerging from Spring Training showcase the constant evolution of baseball, as players strive to refine their skills, add new weapons, and overcome physical challenges. These adaptations could have a significant impact on the upcoming season, with teams and players looking to gain an edge in the competitive MLB landscape.