Jacob deGrom’s Remarkable Comeback: A Lower Arm Slot and Dominant Performances

In a stunning display of resilience, Jacob deGrom is once again proving why he is one of Major League Baseball’s most skilled pitchers. Known for his acute attention to detail and mastery over his delivery, deGrom has returned to dominance in the 2025 season, sporting an adjusted arm slot that is lower than his previous years. This pivotal change is occurring during deGrom’s first full season back from two Tommy John surgeries, making it a key aspect of his performance.

The Science Behind deGrom’s Mechanics

At 36, Jacob deGrom continues to adapt his mechanics to ensure peak performance. In 2025, his average arm angle stands at 30 degrees, marking his lowest recorded since Statcast began tracking arm angles over five years ago. The significance of this change cannot be understated, as deGrom himself recognizes the impact a small adjustment can have on his pitching style. He shared, “When [my arm angle] climbs, I noticed I got a little bit more sore,” emphasizing the importance of finding a comfortable and effective delivery mechanism.

As deGrom re-establishes himself, the effectiveness of his pitches has notably surged. In his last three starts, he has achieved a 10-strikeout game, shut out the Houston Astros for eight innings, and held the New York Yankees to just two runs while striking out nine batters. Fans are starting to see the familiar deGrom; one who takes command of the mound with surgical precision.

The Evolution of a Pitcher

The statistical data illustrates the measure of change deGrom has embraced. Comparing his current arm angle with seasons past shows a notable decline of at least five degrees from his peak years, where he previously averaged 35-36 degrees. His four-seamer and slider, which were his most effective pitches, are now being deployed with an arm angle that approaches the sidearm style, resulting in changes in their horizontal movement.

Four-seamer: Dropped from 34 degrees to 28 degrees
Slider: Decreased from 37 degrees to 32 degrees
Changeup: Shifted from 37 degrees to 31 degrees
Curveball: Adjusted from 40 degrees to 36 degrees

Such a variance in arm angle can often introduce risks of unwanted movement, especially concerning his four-seamer’s ride through the strike zone and the downward snap of his slider. The adjustment to his lower arm slot has led to increases in horizontal movement compared to previous seasons. As deGrom put it, “I’ll get a little beside [the baseball] and run it a little more, which I don’t like,” showing his commitment to maintaining his signature purist style of pitching.

Looking to the Future

Although 2025 may be shaping up as a remarkable return for Jacob deGrom, he is keeping an eye on the adaptability of his mechanics, noting that adjustments are ongoing. After a strong showing in April with a lower arm angle, his arm slot has incrementally increased to 31-32 degrees in May, reflecting a possible return to his higher comfort zone.

As he navigates this critical phase in his career, deGrom’s focus remains clear: maintaining health while executing pitches that have defined his legacy as one of the best in the game. With each passing game, fans are hopeful that Jacob deGrom will continue to not only recover but thrive, putting him once again among the elite pitchers of Major League Baseball.

Frequently Asked Questions

What led to Jacob deGrom adjusting his arm slot?

DeGrom made the adjustment for comfort and to alleviate soreness he felt with a higher arm angle, which has improved his recovery.

How has deGrom’s performance changed in the 2025 season?

This season, deGrom has showcased reinvigorated command and dominance, recording significant strikeouts and shutouts against some of the toughest lineups.

What is the significance of the lower arm angle for deGrom’s pitches?

The lower arm angle impacts the movement profiles of his pitches, which can sometimes yield additional horizontal movement, making it essential for him to maintain control.

Is Jacob deGrom’s current arm slot permanent?

While deGrom is currently pitching with a lower arm slot, he is constantly adjusting based on feel and performance, suggesting it may evolve throughout the season.

What are deGrom’s goals for the remainder of the season?

DeGrom aims to maintain his health and execute pitches that allow him to dominate hitters while ensuring he adapts to the fluctuations of his mechanics.