Chicago Cubs
Although they have not thrown an MLB pitch in 2024, Joe Thatcher threw 4,714 pitches that were tracked by the PITCHf/x system between 2007 and 2016, including pitches thrown in the MLB Regular Season and Spring Training. In 2016, they relied primarily on their Cutter (84mph) and Slider (77mph).
In 2016, compared to other LHP:
Their cutter (take this with a grain of salt because they've only thrown 6 of them in 2016) generates an extremely high number of swings & misses compared to other pitchers' cutters, is an extreme flyball pitch compared to other pitchers' cutters, has slightly below average velo and has strong cutting action. Their slider (take this with a grain of salt because they've only thrown 4 of them in 2016) comes in below hitting speed, is basically never swung at and missed compared to other pitchers' sliders, sweeps across the zone, has much less depth than expected and results in more flyballs compared to other pitchers' sliders.