Boston Red Sox
Although they have not thrown an MLB pitch in 2024, Dan Runzler threw 1,511 pitches that were tracked by the PITCHf/x system between 2009 and 2017, including pitches thrown in the MLB Regular Season and Spring Training. In 2017, they relied primarily on their Fourseam Fastball (95mph) and Slider (85mph). He also rarely threw a Change (87mph).
In 2017, compared to other LHP:
Their fourseam fastball is a real worm killer that generates an extreme number of groundballs compared to other pitchers' fourseamers, has some natural sinking action and has well above average velo. Their slider is basically never swung at and missed compared to other pitchers' sliders, results in more flyballs compared to other pitchers' sliders and has some two-plane movement. Their change (take this with a grain of salt because they've only thrown 1 of them in 2017) is thrown extremely hard, is basically never swung at and missed compared to other pitchers' changeups, is an extreme flyball pitch compared to other pitchers' changeups and has some natural sink to it.