Seattle Mariners
Although they have not thrown an MLB pitch in 2024, Hisashi Iwakuma threw 12,951 pitches that were tracked by the PITCHf/x system between 2012 and 2017, including pitches thrown in the MLB Regular Season and Spring Training. In 2017, they relied primarily on their Slider (80mph), Fourseam Fastball (86mph) and Sinker (85mph), also mixing in a Splitter (81mph) and Curve (69mph).
In 2017, compared to other RHP:
Their slider comes in below hitting speed, is basically never swung at and missed compared to other pitchers' sliders and results in somewhat more flyballs compared to other pitchers' sliders. Their fourseam fastball comes in below hitting speed, is an extreme flyball pitch compared to other pitchers' fourseamers and has some natural sinking action. Their sinker is so slow that it is substantially gravitational, is basically never swung at and missed compared to other pitchers' sinkers, results in somewhat more flyballs compared to other pitchers' sinkers and has some natural sinking action. Their splitter has some natural sink to it and has below average velo. Their curve comes in below hitting speed, results in more flyballs compared to other pitchers' curves and has slight glove-side movement.