Kade Anderson’s Fastball: Promises and Perceptions in Spring Training

Kade Anderson’s fastball may not boast overwhelming speed or an eye-catching shape, but that doesn’t diminish its potential effectiveness. As the Mariners’ young prospect navigates his first two outings of Spring Training, he has drawn both praise and skepticism, with opinions diverging between enthusiastic team assessments and less favorable analytical models.

Anderson’s fastball, as evaluated by Thomas Nestico’s Stuff+ model, currently grades at 91, which is approximately 10% below the league average. This metric, which analyzes a pitch’s physical characteristics such as velocity, spin, and movement, helps paint a clearer picture of a pitcher’s arsenal. For context, the Mariners’ all-time leader in Stuff+ is Andrés Muñoz, setting a standard that makes Anderson’s current performance appear lackluster. With an average four-seamer velocity of 93.4 mph, Anderson’s offering does not stand out in a league where speed is often king.

The pitch’s movement is also relatively conventional, lacking the pronounced rise of an elite fastball or the drop of a sinker that typically generates swings and misses. While many successful pitchers thrive with less distinguished fastballs, concerns arise when expectations are set high. FanGraphs has previously awarded Anderson’s fastball a 70 grade on the traditional scouting scale, a stark contrast to what the data suggests.

Nonetheless, the effectiveness of a fastball extends beyond raw numbers. Brendan Gawloski, in a report for FanGraphs, highlights how Anderson’s fastball sits between 92-95 mph and benefits from a deceptive delivery that masks the pitch until the last moment. This unique arm action has led to a remarkable miss rate, underscoring the pitch’s potential despite its statistical shortcomings. Mariners’ general manager Jerry Dipoto echoed this sentiment, emphasizing that the way Anderson delivers the ball makes it challenging for hitters to pick up.

Teammates have also noted the difficulty in tracking Anderson’s fastball during practice. Ryan Bliss remarked on its deceptive nature, stating, “It’s got some teeth on it… It feels like 96-97.” This kind of feedback suggests that while the numbers may not impress, the actual experience of facing Anderson in the batter’s box tells a different story.

In addition to the fastball, Anderson showcases a slider, changeup, and curveball, each of which grades more favorably in models. This variety, combined with his deceptive delivery, creates a challenge for hitters who must prepare for multiple pitch types and speeds. The complexity of his arsenal is an essential factor that advanced metrics are beginning to recognize.

Despite the scrutiny, it’s important to remember that Anderson is still developing. He has yet to make a professional appearance beyond these spring exhibitions, and his abilities will evolve as he gains experience. The Mariners’ investment of $8.8 million when they drafted him third overall speaks volumes about their confidence in his potential, as noted by Justin Hollander. However, the pressure of high expectations looms large, especially as the Mariners aim for a championship this season.

With legitimate questions surrounding their rotation depth, the organization must consider how quickly Anderson can ascend through the ranks. Is he the sixth, seventh, or eighth starter? While the answers remain unclear, one thing is certain: much like his fastball, Kade Anderson has the potential to surprise us all.

Note: This recap is an independently written summary based on publicly available reporting.