01/12/2018 - 2018 Under Armour All-America Pre-Season Tournament Jackson continues to show a big upside on the mound. He works through a strong balance point with an upbeat tempo. Arm action is loose / quick through a low ¾ arm slot. Arm strength is well above average as indicated his top velocity to date at 84 mph. Fastball showed a range of 80-84 mph. Breaking ball is an outstanding pitch, displaying 11/5 shape with late, sharp break. He maintains arm speed on his changeup showing a feel for pitch with arm side run. Off speed stuff show as quality pitches that will get outs. Control is solid as he attacks hitters and throws strikes with all his pitches.