Koyo Aoyagi Stats & Bio | Phillies Pitcher

About Koyo Aoyagi

Koyo Aoyagi currently serves as a pitcher for the Philadelphia Phillies, wearing jersey #31. Born on December 11, 1993, in Yokohama, Japan, Aoyagi brings international experience to the Major Leagues. Standing at 5'11" and weighing 175 pounds, he combines technical precision with athletic versatility on the mound. Before joining MLB, Aoyagi developed his skills at prestigious Teikyo University in Japan, where he honed his distinctive pitching style. His journey from Yokohama to Philadelphia represents the growing global influence in America's pastime. Known for his disciplined approach and meticulous preparation, Aoyagi exemplifies the dedication common among Japanese-trained pitchers who transition to American baseball. His compact frame allows for deceptive deliveries that keep batters guessing, while his international background brings a unique perspective to the Phillies' pitching rotation. Fans appreciate his composed demeanor during high-pressure situations.

Updated: Feb 14, 2026