Shawn Armstrong throws a slurve and needs a true curve. A thread. #Orioles

So Shawn Armstrong has some interesting traits, he has well above average fastball spin per MPH. 30th in Bauer Units (RPM/MPH) out of 598 MLB pitchers in 2019. His fastball plays pretty well despite 1/

— Luke_Siler (@The_Luke_Siler) December 15, 2019