Jack McDonald

@DrivelineBB Hitting trainer | Wilmu baseball alum | Former Hitting Coach/Recruiting coordinator RCSJ-Cumberland

[Jack McDonald @JackMbmac]

🧵 I've been at Driveline for almost 3 months and I've learned more about player development than I ever thought possible
If you're a college/high school coach wanting to turn your hitters into ANIMALS, this thread is for you 👇

[Driveline Baseball @DrivelineBB]

22 of our hitting athletes earned conference honors in 2026 📈

Swipe to see every name ⬇️

[Tyler Kozlowski @tykoz15]

Offseason gains 💪💪💪

Campos was in everyday in the offseason putting in the work. Getting strong is never a bad idea

[Carson Evans @carsonevanss]

A great example of why being able to swing fast and pull the ball in the air can dramatically improve the quality of a miss

Not too many cases where a batted ball with a 49° LA ends up as a homer unless you swing very fast and can hit the ball to the right part of the yard

Just one of 9 home runs to have a LA of 49° or higher in the Statcast era

[Driveline Baseball @DrivelineBB]

Jacob Jarrell bet on himself ahead of his senior season and it translated into a monster year for the Tigers 🚀

.396 OBP | .579 SLG | .975 OPS | 18 HRs
Second Team All-ACC 🏆

[Christian Leone @_Chrisleone]

My guy

[Dylan Robertson @DylRobertson13]

Week 1 for @DavidsonBASE Theo Loughlin

Key Focus -> Rotate in Footplant to create more separation + bat speed

Theo brought up valid concerns beforehand on if that would affect direction.

It will not if done with posture and proper POC.

Making the bag deeper

[Eric Kozak @kozy_shack]

Truly absurd display of power from @collinpriest13 (1B, currently in the Portal)

100th percentile Bat Speed👀
Facility MoCap EV Record (113.7mph)
Facility Distance Record (476')

[Jack McDonald @JackMbmac]

What offseason training can unlock ⚡️

94th percentile speed will play

[Springfield Cardinals @Sgf_Cardinals]

WHAT A SHOT by Ryan Campos. 109 MPH liner for a solo blast.

[Tanner Stokey @Tstokey]

This Home run brought to you in part by swinging the bat very fast

[sam ehrlich @SamEhrlich]

To beat Chase Burns, Bobby Witt Jr. has to be on time for the velo tonight.

@DylRobertson13 and @Travis_Sawchik break down the game plan.

[Springfield Cardinals @Sgf_Cardinals]

WHAT A SHOT by Ryan Campos. 109 MPH liner for a solo blast.

[Jorge Arrate @JArrate25]

@wpowell24 has put in some great work.

Here he is back in June of 2025 to his most previous reassessment last month. Quite a difference huh...

Let's look at what he improved at⬇️

[Driveline Baseball @DrivelineBB]

Collin Priest breaks facility record 🚨

He absolutely mashed in his MoCap with us last week and broke the distance record previously held by *checks notes* Collin Priest.

He also recorded the highest bat speed number we've seen in an assessment (Florida facility).

[Jack McDonald @JackMbmac]

Speed matters🚀

[MLB Home Runs @MLBHRs_]

CHC - Pete Crow-Armstrong Solo HR (7)

📏 444 ft | 💨 114.6 mph | 📐 30°
⚾️ 96.8 mph four-seam fastball (STL - RHP Gordon Graceffo)
🏟️ Out in 30/30 parks 💣

CHC (4) @ STL (1)
🔺 8th

#Cubs

[Driveline Baseball @DrivelineBB]

Rotation: "Pushing" vs. "Holding the ground"

IMG's two-way star Kyler Meccage works with hitting coordinator @kozy_shack. Full swing design on YouTube ⬇️

[Eric Kozak @kozy_shack]

The ability to adjust the timing of when the barrel releases & when Bat Speed peaks is important

Same hitter making contact out front & getting to the pull-side vs making contact deep & driving a ball oppo

[LukeBrkljacic27 @LukeBrkljacic27]

Uncommitted 2027 RHP/1B/3B
6”0 195 GPA 4.57.
Summer schedule with @TopTierBaseball excited for the last one! @EliteRecruits_ @_GoRoos @190CatcherTD @pistolplante @DrivelineBB @McBrideStrength @JackMbmac @Coach_Deck

[Jorge Arrate @JArrate25]

What 11 months of consistent work can look like.

+8 mph Exit Velocity

[Jorge Arrate @JArrate25]

Simple constraints to help with barrel entry ⬇️

- Oppo Angle Pitch
- Away and Deep Tee Placement
- Ball Flight Focus = RCF Gap

[Brandon Dim @BrandonDim24]

See where your attack angle gets on plane in the swing
(Green range is 4-16 degrees)
Out front point of contact tends to be:
- Higher EV📈
- Higher AA📈
- More Damage🚀
But only if your bat path is moving the right way
AND then we still have room for error