07/09/2013 - College PREP - Minnetonka (Minneapolis), MN Jonny is a tall, athletic SS that will graduate in 2015. Foot speed is well above average as indicated by his 6.90 60 time. Feet are active as he moves well laterally, displaying range in the MIF. Hands are soft / clean but needs to present more out front and play through balls to continue to improve defensive grade. Throws are accurate, but will benefit by building more arm strength through a long toss program. At the plate, Mracek shows a balanced approach with rhythm. Hands are loose and work through a level swing path. He makes consistent contact, mainly to the pull side. For hitting grades to continue to improve, he needs to work to keep hands inside the ball to utilize all fields. Power numbers will continue to improve as he learns to use his lower half more. On the mound, fastball shows a range of 74-78 mph on a downhill plane. Breaking ball displays 11/5 shape with gradual break. He maintains his arm speed on his changeup, showing a feel for with fading action. With 2 years to further develop, Jonny has abilities with time and room to improve.