DMACK Development
Played in MLB, NPB, and KBO and Increased his Maximum Exit Velo by 8 MPH in 6 months
Our Products
Monthly Remote Swing Development Program, 3 Month Program, and 6 Month Program
This program mirrors exactly what David did during his ACL rehab in 2019 increasing his maximum exit velocity by 8 MPH within a year, which in turn got him to the MLB. We will provide a full blueprint on how get stronger, increase your exit velocity, improve your approach, and make your mental side of the game stronger. The most important statistic in the game today is exit velocity. We will have two 30-40 minute checkin meetings per month. You will also have access to chat and have the ability to send video 24/7 through the CoachNow app. Responses will typically be made within 24 hours. The app willl have over 60 drills for your use and David will point you to what drills will benefit your particular swing the most. A baseball specific strength and conditioning program will be provided with the goal of increasing exit velocity by increasing speed, strength and explosiveness. Our prices are $300 monthly, $800 for the 3 month plan, and $1500 for the 6 month plan. You will be receiving MLB coaching for a fraction of the price. The bigger the plan the bigger the savings. Athlete must be at least 12, able to lift and have a desire to play baseball at the next level.
Swing Assessment
Send us game video of your swing from the front side. We will do a 30 minute video call analyzing your swing. We will go through some different approach ideas and some mechanical ideas that could help your swing based on the issues you are currently having. We will also provide you with drills that will help. Swing Assessment is mandatory before signing up for remote swing development program so David can meet the athlete and parent and get a better idea if the development program would be a good fit for them. Swing Assessments are for ages 10 and up. Pricing is $50.
Ebook: From Average Joe to the Show
This book is for the underdogs who were told they dreamed too big, Read about David's Journey going from a mid tier college baseball prospect to a Big Leaguer. The ups and downs, the work, the effort, and the reality of what Division 1 college baseball and professional baseball is. Anyone wanting to play high level college baseball or professional baseball...this book is for you! Priced at $1.
About David MacKinnon
David grew up in Easton Massachusetts. He played 4 years of varsity baseball and soccer before continuing his career in both sports at the University of Hartford. MacKinnon broke the all time hits record at Hartford and was named the America East Player of the year in 2016. He was also named First Team academic All American for the 2016 and 2017 seasons. He was drafted by the Los Angeles Angels in the 32nd round, 955th overall. He made his Major League Debut on June 18th, 2022. Following the conclusion of the 2022 season David elected free agency and signed with the Seibu Lions of the NPB for the 2023 season. In 2024, MacKinnon decided to accept a contract playing in the KBO for the Samsung Lions and made the All Star team. He played winter ball in Puerto Rico from November 2024 to February 2025 in an effort to make a comeback to stateside baseball. His team, the Mayaguez Indios, won the championship. Unfortunately, he did not sign a contract before the 2025 season and has decided to continue his coaching career. He has coached over 125 athletes throughout his career and hopes to be able to have a greater reach and impact through remote training.In 2019, MacKinnon tore his ACL two weeks into the season. He was at a crossroads. He battled the decision to potentially retire or to rehab and fully dive into the biomechanics of the swing and how the body and the sequence of the swing works. His wife Jordan, convinced him to give it one more go. He studied some of the best hitters in the big leagues, specifically Mike Trout and Vlad Guerrero Jr. He analyzed why their swings were so much more consistent and powerful than his swing. He realized the key to becoming more consistent and more powerful was to find a way to hold his posture and create a lot of ground force. This discovery jump started his rise to the big leagues. During his rehab, he increased his exit velocity by 8MPH in 6 months which helped him increase his homers, doubles, slugging and OPS which in turn got him his call to The Show.