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
Curveball
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Curveball
Sweep+
A sweeping breaking ball moves horizontally with velocity through the zone. Sweep+ of 100 is MLB average.
The maximum speed, in the direction of home plate, that the wrist is traveling. Measured in meters per second (m/s)
Arm Slot
Angle of the forearm relative to the ground between maximum external rotation (MER) and ball release (BR). Which can be a powerful player comparison metric, delivered in degrees.
Knee Extension Velo
The angular velocity of the front knee straightening after foot plant, which provides indicators of velocity potential. Measured in degrees per second.
Deception
The amount of time that the ball is visible to the hitter, after the instant of front foot strike. Measures in milliseconds.
Hip-Shoulder Separation
The difference in angle of between the hips and shoulders, occurring close to the foot plant. Measured in degrees.
One of the more intriguing looks on the mound came from RHP Ethan Faith (Jacobs, 2025). Standing 6-foot-2, 165-pounds, Faith still has all sorts of room to add on strength in the coming years. The right-hander worked exclusively out of the stretch with a wide base and front foot closer to third, creating some deception immediately before moving with a drop drive lower-half down the mound. His arm is long and loose out of the glove, transitioning into a ¾ slot. His fastball sat comfortably in the 77-80 mph range, topping out at 81 mph with heavy sinking action (T20.3” HM). His best secondary offering was a cutter at 71-73 mph, playing with sharp 10/4 action and late sweep - acting more like a slider but is absolutely a pitch he should keep in his arsenal moving forward. Lastly, he went to a curveball at 65-66 mph, kept down in the zone with 11/5 shape.
10/16/22
Positional Profile: RHP Body: 6-2, 165-pounds. Delivery: Stretch only, wide stance with front foot closer to third, drop/drive lower-half that maintains a slight bend in the back knee while striding down the mound. Arm Action: RH. Long/loose arm action, 3/4 slot. FB: T81.1, 78-80 mph. Runs with heavy action to the arm-side. T2075, 1905 average rpm. CB: 65-67 mph. Downer 11/5 shape, kept down. T2085, 2043 average rpm. CUT: 72-73 mph. Sharp 10/4 action with depth, kept down.
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One of the more intriguing looks on the mound came from RHP Ethan Faith (Jacobs, 2025). Standing 6-foot-2, 165-pounds, Faith still has all sorts of room to add on strength in the coming years. The right-hander worked exclusively out of the stretch with a wide base and front foot closer to third, creating some deception immediately before moving with a drop drive lower-half down the mound. His arm is long and loose out of the glove, transitioning into a ¾ slot. His fastball sat comfortably in the 77-80 mph range, topping out at 81 mph with heavy sinking action (T20.3” HM). His best secondary offering was a cutter at 71-73 mph, playing with sharp 10/4 action and late sweep - acting more like a slider but is absolutely a pitch he should keep in his arsenal moving forward. Lastly, he went to a curveball at 65-66 mph, kept down in the zone with 11/5 shape.
Positional Profile: RHP
Body: 6-2, 165-pounds.
Delivery: Stretch only, wide stance with front foot closer to third, drop/drive lower-half that maintains a slight bend in the back knee while striding down the mound.
Arm Action: RH. Long/loose arm action, 3/4 slot.
FB: T81.1, 78-80 mph. Runs with heavy action to the arm-side. T2075, 1905 average rpm.
CB: 65-67 mph. Downer 11/5 shape, kept down. T2085, 2043 average rpm.
CUT: 72-73 mph. Sharp 10/4 action with depth, kept down.