Our Staff

Coach Bay Paul

Coach Paul grew up playing baseball in Florida until he moved to Michigan in 2005. Bay was a Florida All-State High School Pitcher. After highschool, Bay played College Baseball at Gulf Coast CC (JUCO), University of Central Florida (DI), and University of West Florida (DII). Bay Also played in the Valley Summer Collegiate Wooden Bat League and also the Great Lakes Summer Collegiate Wooden Bat League.

Bay was an instructor at Florida State University Baseball Camp and also coached youth baseball in Orlando, Florida along with coaching high level youth travel ball in Michigan.  Coach Paul has accumulated over 300+ coaching wins (Perfect Game, PBR and USSSA) since 2013, plus multiple appearences in the Perfect Game Super 25 National Championships and Perfect Game World Series.  Many of Coach Paul's teams have been ranked nationally.


Coach Shaun Marks

Coach Marks is considered one of the top hitting instructors in Michigan. Coach Marks is a certified Epstien Academy Hitting Instructor (Denver, CO), which focuses on the bio-mechanics of the baseball swing.

Coach Mark's ability to understand the swing on a biophysical level and then translate that data in an easy to learn, understandable teaching system is what makes his results so extraordinary.

Epstein Hitting Academy works with over 40 Professional Baseball Players today.  Coach Mark's 12U team in 2018 was USSSA Open State Champs and Runner-Up at Cooperstown.


Coach Bennett Stapf

Coach Stapf, was a high school standout in Baseball & Basketball. After highschool in 1999, Coach Stapf accepted a D1 scholarship to play for Winthrop University (Rock Hill SC) in the Big South Conference. Coach Stapf was a Third Basemen & First Basemen and became a NCAA Freshman-All American and was selected to the All Big South Conference Team (2001 & 2002).

He led the Eagles (ranked 25th) to their first ever at-large birth to the NCAA Regionals. Coach Stapf also spent his summers playing in the Coastal Plains Summer Wooden Bat Leage and the New England Collegiate Baseball League, where he was an All-Star and led the league in Homeruns.

Since his college days, Coach Stapf has been coaching youth travel baseball and softball for the past 5 years.


Coach Christian Penn

Coach Penn, owned and operated Diamond Pro Training (youth baseball instruction) for the past 6 years. He focused on camp/clinic style training for hitting, fielding, and catching.
Coach Penn also was the Assistant Varsity Coach at Bloomfield High School and is now the Head Coach of our 2025 Expos Team.  Coach Penn also specializes in Catching and Hitting Instruction.


Coach David Martin

Founder of the Michigan Expos is David H. Martin. Martin has served the game of baseball professionally for over twenty years and brings a wealth of experience both in the business of baseball and on the field play.

On the field, Martin is known as an accomplished clinician and true student of the game of baseball coaching and managing in both the collegiate and professional baseball ranks. Beginning his collegiate coaching days at Henry Ford Community College, Martin went on to coach at three NCAA Division 1 Baseball programs including the University of Miami of Florida, Bowling Green State University and Eastern Michigan University. Martin known as a great communicator of the fundamentals and strategy of the game has been a featured speaker at the prestigious American Baseball Coaches Association Convention on two separate occasions. During his tenure at the University of Miami, Martin worked under legendary college coach Ron Fraser and assisted the Hurricanes to a 1992 Atlantic Regional Championship and a trip to the College World Series in Omaha, Nebraska. Having the opportunity to coach over sixteen players to the Major Leagues including such names as Charles Johnson, Danny Graves and Mike Lowell, Martin has a keen eye on what makes a Big League player.

In addition to his collegiate coaching experience, Martin has managed professionally in several leagues including the Great Lakes League, Northeastern League, Frontier Professional Baseball League and the prestigious Cape Cod League where he coached the former Chatham A’s, the team featured in the 2001 movie Summer Catch.

The founder of three baseball industry companies, Martin keeps his unique talents on the pulse of the national game. Martin has consulted and created fan experience environments and themed marketing campaigns for fourteen Major League Baseball Teams including the Cincinnati Reds, Texas Rangers, New York Yankees, Kansas City Royals and the Tampa Bay Rays. He has also worked directly for Major League Baseball developing their MLB Wanna Play initiative to attract and share baseball with inner city youth featured during the MLB Civil Rights Game and World Series. His experience extends to Minor League Baseball as well as he has designed and produced the festivities surrounding the Triple-A All Star Game on five different occasions both in the Pacific Coast League and International League markets. Martin has also designed and produced the fan festivals surrounding the College World Series in Omaha, Nebraska for the last two seasons for the NCAA featuring both historical and baseball interactive displays.

An accomplished baseball historian, Martin has spoken at many musuems throughout the United States on the topic of baseball history including the National Baseball Hall of Fame and Museum in Cooperstown, New York. Martin has written two one man theatrical performances featuring the life and times of Ty Cobb and Branch Rickey.

Coach Martin has had the opportunity of coaching over sixteen players to the Major Leagues including such names as Charles Johnson, Danny Graves and Mike Lowell, Martin has a keen eye on what makes a Big League player.