Although they have not thrown an MLB pitch in 2023, Mike Brosseau threw 108 pitches that were tracked by the PITCHf/x system between 2019 and 2022, all of them occuring in the MLB Regular Season. In 2022, they relied primarily on their Fourseam Fastball (75mph), also mixing in a Change (58mph).
In 2022, compared to other RHP:
His fourseam fastball comes in below hitting speed, has heavy sinking action, is a real worm killer that generates an extreme number of groundballs compared to other pitchers' fourseamers, is basically never swung at and missed compared to other pitchers' fourseamers and has less armside movement than typical. His change (take this with a grain of salt because he's only thrown 5 of them in 2022) comes in below hitting speed, is basically never swung at and missed compared to other pitchers' changeups, has surprising cut action and results in more flyballs compared to other pitchers' changeups.