6/5/18 - Young 6-foot-1, 165-pound frame. Two-way prospect. Body projects to add considerable size and strength in the coming years. On the mound Arnold creates downhill angle to the plate. Long, clean, hand driven arm action. Lower and upper half separate well. Lead leg fully stabilizes into ball release resulting in good transfer of energy. Worked 73-76 mph with his fastball using a high ¾ arm slot. Have seen up to 78 mph in the past. Two-seam showed fade to his arm side. Had feel for his curveball thrown at 62-64 mph with solid 11/5 shape. Repeated fastball arm speed and mechanics on his 68-72 mph changeup. Offensively started from a tall, open, balanced stance. Leg kick loading pattern and stride. Back elbow remained high into stride foot contact. Consistently hit balls hard in the air as his swing generates plenty of loft. Showed present bat speed and projects for more as he matures; 81 mph exit velocity. Defensively profiles well at first base. Showed the ability to move well around the bag; 76 mph position velocity. 7.67 60 yard dash.
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