Prep Baseball Report




Western Michigan
Waubonsie Valley (HS) • IL
6' 2" • 215LBS
L/L • 26yr 1mo


2016 National

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2016 State

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9.12.15 - Verbally commits to Western Michigan.
5.7.15 - 6-foot-2, 215-pound left-handed hitting LHP/1B. Threw complete game the day before, more known for pitching prowess, ranked No. 57 in IL’s 2016 class but impressed swinging the bat on Wednesday. Strong build, wide shoulders, thick lower half. Hits from an open stance, hands held around letters, natural lift to swing, lets the ball get deep, power to opposite field gap. Lined out to short hard, doubled to left center, and flew out to left for a sac fly.

2.15.15 - 6-foot-2, 220-pound left-handed pitcher impresses with three pitch feel highlighted by 81-82 mph with plus arm side run, occasional sink from long, loose, high ¾ to ¾ arm slot. Easy effort throughout delivery, tall/fall delivery, toe up at balance point, shoulders work slightly uphill, works slightly across body, adds to deception, doesn’t affect command. 67-70 mph curveball thrown with 2/8 shape, occasional late break. 74-75 mph changeup is a plus pitch, plus feel for locating it with late sinking action to his arm side. Petersen has a large frame but an extremely loose and athletic arm action. He’s a high follow prospect over the next two seasons.
10.19.14 - 6-foot-2, 220-pound physical, wide shouldered, strong lower half left-handed pitcher currently ranked No. 46 in Illinois’ 2016 class; works from a short, quick, loose, high ¾ arm slot, toe up at balance point, closes off shoulders to load over rubber, foot stays under knee, compact delivery, lands slightly closed, throws slightly across his body, but creates deception hiding the baseball. Fastball sat 83-84 mph for strikes with heavy action. Curveball thrown hard with 1/7 shape with depth at 71-72 mph from the wind, 67-69 mph from the stretch. Also threw strikes with 76-79 mph changeup with late cutting action. Keeps ball down in the zone and has a feel for three pitches.
5/13/14 - Ranked No. 36 in the state, No. 150 overall. Big bodied 6-foot-2, 220-pound left handed pitcher, sturdy lower half, broad shouldered. Arm action is loose, high ¾ slot. Delivery stays closed, quick rocker step to balance position from the windup, works slightly across his body, adds some deception. Showed a variety of moves to hold the running game in check, athleticism present. Fastball topped at 84 mph, sat 80-82 mph with heavy feel and excellent command early in the game, worked down in the zone. Curveball showed depth and feel, 70-72 mph, 11/5 shape, showed the ability to throw for strikes and expand the zone. Petersen has a presently large build with projection for more on his fastball, his arm works fast and loosely and has current strength. High follow 2016 prospect.
1.19.14 - Advanced physical make up for age, wide shoulders, strong lower half. 6-foot-2, 220-pound left handed pitcher. Athletic delivery, up tempo, works on line, athletic finish. Arm works quickly, loose arm action, high ¾ slot. Fastball has finishes with a slightly heavy feel, 78-81 mph. Curveball shows excellent potential, tight hard action, thrown with conviction, highly aggressive, 70-72 mph, fastball arm action. Changeup also thrown aggressively with fastball arm action, sinking action thrown for strikes, advanced feel. Peterson’s secondary stuff has plus potential due to his aggressive arm action. One of the top left handed pitchers in the state Peterson should be a highly coveted prospect in his class.
8/18/13 - 6-foot-1, 210-pound southpaw. On the mound he throws from a high ¾ slot with a loose arm that works well. His delivery has good lines and is athletic. Fastball has solid arm side run and crisp finish at 77-80 mph. Showed feel for his changeup, throwing it with consistent sink and fade at 71-74 mph. His curveball has an 11/5 tilt and sits 66-68 mph.
9/9/12 Peterson is 6-foot, 190-pound multi-positional player who impressed at the plate with his left-handed swing.  Peterson has a projectable frame that he used to get some power behind his swing.  Defensively, Peterson was clocked at 69 mph from the outfield.  On the mound, Peterson throws from over the top with a 73-75 mph fastball.  His off speed pitches include a 60-61 mph curveball and a 66-68 mph changeup.

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