A fastball with hop has a flat approach angle and visually jumps through the zone. When thrown up in the zone, it is more likely to generate a higher swing and miss average. Hop+ of 100 is MLB average.
Fastball
Sink+
A fastball with sink has low backspin and drops through the strike zone. When thrown down in the zone, it is more likely to generate a higher ground ball percentage and lower launch angle. Sink+ of 100 is MLB average.
Fastball
Rise+
A fastball with rise has a high percentage of backspin. When thrown up in the zone, it is more likely to generate a higher fly ball percentage. Rise+ of 100 is MLB average
+ This was our staff’s first viewing at LHP Caleb Mosley (Waukesha North, 2026) and we were pleasantly surprised. Mosley measured at 5-foot-11, 177 pounds with more strength coming to his frame. The left hander used a smooth and easy delivery to drive the 86-87 mph fastball through the zone. He used a sharp sweeping type slider out of the same window as the fastball at 73-74 mph and was able to locate the pitch in the zone for strikes. He also showed feel for a 73-75 mph change up to round out his three pitch mix which should play well as a starter. Mosley opened some eyes on Sunday and is a name that is being talked about among the Prep Baseball staff.
2/23/25
Caleb Mosley, Waukesha North (WI), 2026 Positional Profile: LHP/OF Body: 5-11, 177-pounds. Compact build with strength. Delivery: Controlled tempo, easy mover, high leg kick, short stride. Arm Action: LH. Short arm action, 3/4 slot, some quickness. FB: T87, 85-86 mph. Life out of the hand, strikes. T2262, 2185 average rpm. SL: 73-74 mph. Tight sweeping action, strikes. T2267, 2252 average rpm. CH: 73-75 mph. Fading action, some feel. T1213, 1160 average rpm.
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Positional Profile: LHP/OF
Body: 5-11, 177-pounds. Compact build with strength.
Delivery: Controlled tempo, easy mover, high leg kick, short stride.
Arm Action: LH. Short arm action, 3/4 slot, some quickness.
FB: T87, 85-86 mph. Life out of the hand, strikes. T2262, 2185 average rpm.
SL: 73-74 mph. Tight sweeping action, strikes. T2267, 2252 average rpm.
CH: 73-75 mph. Fading action, some feel. T1213, 1160 average rpm.