6/6/17
A talented southpaw in the 2018 class. On the bump Priestley uses an uptempo delivery that requires some effort. Arm move through a near high-¾ slot with obvious arm speed. Arm action is clean and the ball comes out of his hand well. Pounds the zone with his 84-87 mph fastball that has arm side run. His best secondary offering is his slider. The pitch has solid depth and cuts across the plate sharply at 72-75. Also spins a 2/8  shaped breaking ball at 62-64. The pitch has big, gradual break. Also showed feel for a 76-77 mph changeup that has similar run to his fastball.

1/29/17
A southpaw with a very projectable frame 6-foot, 165-pound frame. Had a very impressive showing on the mound. Fastball sat 84-87 mph while majority of his pitches did not get below 86 mph. Fastball showed a lot of natural ASR and occasional sink. Best secondary pitch was the changeup which was thrown at 72-73 mph and had good downward action. Curveball shows potential and the correct shape and spin. Expect for it to get much better as it is thrown harder.