Although he has not thrown an MLB pitch in 2018, Ryan Madson threw 7,820 pitches that were tracked by the PITCHf/x system between 2007 and 2017, including pitches thrown in the MLB Regular Season, the MLB Postseason and Spring Training. In 2017, he relied primarily on his Sinker (95mph) and Fourseam Fastball (96mph), also mixing in a Curve (83mph) and Change (86mph). He also rarely threw a Cutter (93mph).
Basic description of 2017 pitches compared to other RHP:
His sinker is a real worm killer that generates an extreme number of groundballs compared to other pitchers' sinkers, generates a high number of swings & misses compared to other pitchers' sinkers, has well above average velo and has slight armside run. His fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, generates a very high amount of groundballs compared to other pitchers' fourseamers, has well above average velo and has slight armside run. His curve is much harder than usual, results in more flyballs compared to other pitchers' curves, has a sharp downward bite and has primarily 12-6 movement. His change generates more whiffs/swing compared to other pitchers' changeups, has a lot of backspin and is slightly firmer than usual. His cutter (take this with a grain of salt because he's only thrown 2 of them in 2017) is basically never swung at and missed compared to other pitchers' cutters, is blazing fast, is an extreme flyball pitch compared to other pitchers' cutters, has good "rise" and has little cutting action.