Perkins threw three pitches: a four-seam fastball (95–97 mph), a two-seam fastball (93–96), and a slider (83–86). There is little variation in his pitch usage against right-handed and left-handed hitters. His velocity and effectiveness have increased since the beginning of the 2011 season, coinciding with a move to the bullpen: "Going to the bullpen allowed me to get healthy. As a starter, I had just worn down." In 2009, as a starter, Perkins posted a 5.89 ERA and an average fastball speed of about 90 mph. His ERA has dropped considerably in the bullpen (2.48 in 2011), and his K/9 rate nearly doubled. When Perkins was a starter, he also threw a curveball and changeup.