Beyond the Fastball Andres Muñoz Revolutionizes His Pitching Arsenal

Andrés Muñoz has transitioned from being a high-velocity closer to a strategic powerhouse on the mound. This transformation reflects a significant evolution in his pitching repertoire, prioritizing depth over sheer speed.
From Velocity to Strategy
Muñoz first showcased his talent in Major League Baseball (MLB) with the San Diego Padres on July 13, 2019, where he threw a fastball that reached 100.6 miles per hour. At just 20 years old, he represented the archetypal hard-throwing reliever, with a focus on his four-seam fastball, which comprised 67.1% of his pitches during his debut season.
Injury and Transformation
However, his ascent was interrupted by Tommy John surgery to repair his ulnar collateral ligament, sidelining him for over a year. During this period, he was traded to the Seattle Mariners.
Changing the Game
Muñoz redefined his approach dramatically after his return. Since 2022, he has inverted his pitch usage, shifting to a slider as his primary weapon. This pitch was used 50.4% of the time in 2023, compared to just 35.8% for his fastball.
- Slider: 86.1 mph average speed, 2356 RPM spin rate.
- Fastball: 98 mph average speed.
Strategic Evolution
This mastery of the slider requires more finesse than the traditional fastball. Muñoz’s reliance on this pitch marks a pivot in his identity from a mere cannon to a nuanced strategist.
Conclusion
While speed remains a critical aspect, Muñoz’s evolution highlights that true dominance comes from a diversified arsenal. This adaptability has cemented his status as one of the most formidable closers in the league today.