Boston Red Sox
Although they have not thrown an MLB pitch in 2023, Matt Dermody threw 436 pitches that were tracked by the PITCHf/x system between 2016 and 2022, all of them occuring in the MLB Regular Season. In 2022, they relied primarily on their Fourseam Fastball (92mph), Slider (81mph) and Change (86mph), also mixing in a Sinker (92mph) and Curve (75mph).
In 2022, compared to other LHP:
Their fourseam fastball (take this with a grain of salt because they've only thrown 8 of them in 2022) is basically never swung at and missed compared to other pitchers' fourseamers, is an extreme flyball pitch compared to other pitchers' fourseamers, has much less armside movement than typical, has some natural sinking action and has essentially average velo. Their slider (take this with a grain of salt because they've only thrown 7 of them in 2022) generates an extremely high number of swings & misses compared to other pitchers' sliders, has exceptional depth and results in more flyballs compared to other pitchers' sliders. Their change (take this with a grain of salt because they've only thrown 6 of them in 2022) is an extreme flyball pitch compared to other pitchers' changeups, is much firmer than usual and has slight cut action. Their sinker (take this with a grain of salt because they've only thrown 3 of them in 2022) is basically never swung at and missed compared to other pitchers' sinkers, is an extreme flyball pitch compared to other pitchers' sinkers, has surprisingly little armside run and has slightly above average velo. Their curve (take this with a grain of salt because they've only thrown 2 of them in 2022) is basically never swung at and missed compared to other pitchers' curves, is an extreme flyball pitch compared to other pitchers' curves and has slight glove-side movement.