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For any questions or concerns, please make sure to contact us at one of the following: 


US Baseball

4400 N. 19th Street

Ozark, MO 65721

Mark Stratton: General Manager

Mark Stratton began his duties as General Manager in December 2017 after serving as the VP of Sales & Marketing with US Baseball beginning in January, 2016.

Prior to that, Stratton spent 2 years in the private sector in various managerial roles for Market Fresh Produce, a national produce

marketing company, owned by Springfield native, Steve Phipps, that is located in Nixa, MO.

Mark has been involved in the coaching and promotion of amateur baseball in the Springfield area for over 30 years. He spent 25 years coaching at Glendale HS, leading the Falcons for 13 years as the head baseball coach.

Stratton left the high school ranks in 2006 to spend 7 years at Drury University reviving the Panther Baseball Program to prominence at the NCAA Division II level.

 A 1977 graduate of Southwest Missouri State University, Mark received his Master’s Degree from the University of Missouri in 1981.  Married to his high school sweetheart, Gay SuAnn, they have been blessed with 4 children, and 6 grandchildren.

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Mackie Karlson: Ops Director

Mackie Karlson is entering her fifth year working with US Baseball and The Show Me Collegiate League. A Nixa, Missouri native, Mackie graduated in 2015 from Nixa High School and has a bachelors' a degree in Exercise and Movement Science/Biology from Drury University. Mackie fell in love with game of baseball at a young age as her dad raised her to love the Kansas City Royals. Throughout high school Mackie spent a majority of her time helping the Nixa High School Football Coach and Baseball Coach in strength and conditioning training in the off seasons. Being involved in athletics, whether in a uniform or later in the weight room, Mackie found her passion in the mechanics of how an athletic body achieves and becomes an elite athlete. Her favorite part, she says, about working for The Show Me Collegiate League and US Baseball is that every player brings a story to the field, there is not a single player who has experienced the same pathway to wearing a college jersey and the perseverance of these players each year amazes her. She has a great love for the game and continues every day to be a part of a program that promotes talent and work ethic through the Show Me Collegiate League and everything US Baseball provides.


Jacob Karlson: Food/Bev Coordinator

A native of Nixa, Missouri., Karlson played at Independence Community College in Independence, Kansas., before transferring and completing his collegiate career at College of the Ozarks in Hollister, Missouri. He played three years for the Bobcats, making his time there memorable as his squad claimed the best 3 year span in College of the Ozarks history winning 30+ games all three years. 


Karlson spent the majority of his time as a short stop, moving his senior year into center field, earning First Team AII Conference-Outfield award starting 54 games that year. He finished his 2018 campaign with a 0.347 batting average. Career wise he was seen at the plate during his time at the Ozarks, 560 times. His slugging percentage in his final year at 0.536, home runs (4), RBI (27) total bases (105), stealing 20 bases in 25 attempts. Karlson was also awarded NAIA and AII Conference Champion of Character award. 


After completing his excellent year at College of the Ozarks, Karlson spent the summer season coaching for the Show Me Collegiate League  while completing his undergraduate career in preparation for the California Winter League. Jake played in the CWL last spring and is in his second year now as the Food and Beverage Coordinator at US Baseball and a coach for Founders Club Midwest/Marucci Midwest. 

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Brody Johnson: Office Manager/IT

Brody Johnson is US Baseball Parks I.T. Coordinator and Operations Assistant. This is Brody's first season at the ballpark after spending his first few months learning the ropes, Brody has learned the game of baseball quickly and is a valuable asset to the facility. Brody is a Springfield-native, having graduated high school from Parkview and playing Soccer, Brody spent his freshman year of college on the soccer team at Drury University. Brody is currently branching out and finding that the world of sports is vast and his love for the competitive atmosphere is high. You can find Brody running across the concourse or the field in between games, and during games he becomes the voice of US Baseball. Brody's favorite thing about US Baseball he says is "I get to watch Baseball as a job, that's like the coolest thing ever!" Brody is truly a jack of all trades and we are thankful to have had him for the last 3 years!

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Jeremy Cologna: Show Me League Commissioner 

A Springfield, Missouri native and Glendale High School graduate, Cologna began his collegiate playing career at St. Charles Community College as a two-way player during the 2015 and 2016 seasons. Prior to transferring to Avila University, Cologna was a part of the inaugural 2016 season of the Show-Me Collegiate League, leading the entire league in wins as a pitcher. The following summer, he was also a part of the Show-Me League champion team, The Villains, including closing out the championship game on the mound. During his playing tenure at Avila in the 2017 and 2018 season, he was a part of two 30+ win teams that enjoyed a 22 game home win-streak, and was an errorless defender behind the plate for the Eagles in his career.

Following his playing career at Avila, he began his coaching career with the Eagles as he finished his bachelor’s degree. For two seasons he served as the team’s pitching coach, while assisting in a multitude of areas. He then returned to the Show-Me League as the head coach of the Cobras in the 2020 season, where he was named Co-Coach of the Year. At the conclusion of the 2020 summer, Cologna joined the Missouri State Bears coaching staff as the Graduate Assistant and now holds the title of Volunteer Assistant where he works primarily with the catchers and assists with the hitters. Cologna is a class act and great addition to the Show Me Collegiate League and US Baseball staff! We are blessed to have him! 

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