What pitches did Strasburg throw?
Strasburg's repertoire features five pitches: a four-seam fastball, his primary pitch at 95–97 miles per hour (153–156 km/h), which was recorded as high as 100 mph early in his career, and for which in the 2010 season was one of only three starting pitchers to have pitches of over 100 mph, and all did so at least 21
Regarding this, how was Strasburg tipping his pitches?
During his postgame interview with Tom Verducci on the Fox broadcast, Strasburg said that pitching coach Paul Menhart noticed that the right-hander was tipping his pitches.