Mack Chiavarone is a 2029 C/1B with a 5-7 135 lb. frame from Lawrenceville, NJ who attends Princeton Day. Chiavarone works from a lean projectable build with plenty of time to fill out and add strength as a '29 prospect. Primary C, slight side saddle set to start with repeatable compact mechanics shown. Attempted to work on top of throws with refining actions and footwork. Has additional room to gain ground with developing arm strength up to 63 mph. Posted a 2.38 pop time. Offensively, the left handed hitter started from a wider base with a high hand set and lower back elbow. He successfully kept the hands inside the baseball with consistent impact to the pull side of the field. Should see carry production improve as he physically matures. Posted an exit velo of 66 mph. Ran a 8.06 sixty yard dash.