Matt Whiteside

Owner, Pitching Instructor


Over 6 years Major League Service Time throughout his 17 years of professional baseball career

Matt graduated as a 3 Sport Letterman in 1986 from Charleston High School in southeast Missouri. He graduated from Arkansas State University in 1990 with a Physical Education Degree while also earning American South Conference Player of the year. Matt was a 25th Round Pick of the Texas Rangers in that same year and made his major league debut August 5, 1992 versus the Oakland Athletics. Matt has pitched for seven Major League Organizations (Texas, Philadelphia, San Diego, Atlanta, Colorado, Toronto, and Pittsburgh). Matt played one season in Japan for the Yokohama Baystars in 2003. During Matt’s professional career, he was a double a All Star in 1992, a member of the American League West Division Champion, Texas Rangers in 1996, a member of the National League East Division Champion, Atlanta Braves in 2001,and a triple a All Star in 2005 while setting the single season saves record with 38 that same year. Matt’s enjoyed working with young athletes in various clinics, camps, and private lessons in California, Texas, Washington DC and the Dominican Republic.


Dave Pregon

Owner, Hitting Instructor


Former professional baseball player 1984-87 with the Montreal Expos and the St. Louis Cardinals

Dave has been involved with coaching and instructing players since 1982. Dave was a standout player at Georgia Southern University. Ranked in the top ten most prolific homerun hitters in NCAA Div I College History, and holds several school records. Drafted in 1984 by the Montreal Expos, Dave was voted to the All Star team his rookie year. Dave’s professional career ended in 1987 with the St. Louis Cardinals. Dave has helped coach the Australian National Team and has conducted camps as far away as Puerto Rico. In an effort to combine education, culture, and baseball, Dave continues to take players to Puerto Rico and Florida. Dave is also a member of Fellowship of Christian Athletes.


Scott Terry

Pitching Instructor


Scott Terry is the General Manager of the Oakville Tigers Baseball Club. He has an extensive background in baseball playing professionally for over 17 years.


• Over seventeen years professional baseball experience
• Played professionally for the Cincinnati Reds from 1980-87
• Played professionally for the St. Louis Cardinals from 1987-92
• Detroit Tigers pitching coach in 1996
• Head of Baseball Operations for the St. Louis Cardinals Legends Camp
• St. Louis Cardinals Post-Game Show Analyst for television’s CW-11
• Coordinator of the St. Louis Cardinals’ Kids Clinics
• Played college baseball at Southwestern University from 1978-80
• General Manager of Oakville Tigers Baseball Club


Ashley Eftink

Softball Pitching Instructor


  • Graduated from Central Methodist University in 2005
  • Spent 4 Years Playing NAIA Softball and studied Recreation Administration
  • Received Numerous Honors for Pitching, Utility Player and Offensive Efforts
  • Ashley Made 1st Team All-Conference 3 of the 4 Years She Played
  • Pitcher of the week numerous times and 1st Team All Regional her Senior Year
  • After graduating, she stayed at Central Methodist University to be a Graduate Assistant for the
  • Softball Team, as well as Pitching Coach


Scott Cooper

Hitting Instructor


• Graduated Pattonvile High School -1986
• 1985-86 All State, All American, Pitcher, 3rd baseman
• MVP-1986 -Class 4A Mo. Baseball state championship
• 1986-Gatorade national high school baseball player of the year
• All State Football, Basketball, Baseball in 1986
• 2nd Round Pick 1986 Amateur Baseball Draft-Boston Red Sox
• Voted To All-Star Team every minor league season 1986-91 and 2 times in major leagues 1993,1994
• Played in major leagues 1990-1998 w/Boston red sox, St. louis cardinals, Kansas city royals, Texas rangers, and Seibu lyons of the Japanese league.
• Voted by Baseball America as the Top Defensive 3rd Baseman in American League 1993-1994
• Best Infield Arm in American League 1993-1994 By Baseball America
• Voted Boston Red Sox MVP 1993-1994
• Mentored By Ted Williams and Carl Yastremski while in Red Sox Organization
• 1999-2004 Head Coach for Fontbonne University Baseball Team.
• 2006-Current Cardinals Post Game Anaylst for KSDK Channel 5
• Current Baseball Instructor For All-Star Performance
• Field Coordinator and Co-Founder of STL Gamers Baseball


Justin Rosen

Hitting and Fielding


Justin Rosen graduated Marquette High School 2002 and University of Mobile 2007. Justin earned a 2 year baseball scholarship at St. Louis Community College Meramec & a 2 year baseball scholarship at the University of Mobile, Alabama. He spent five years playing in the Metro Collegiate League. He began his playing career at Meramec Community College where he earned All-Conference honors Sophmore and Senior Year and was Meramec Player of the Month in 2004. He lead the team in home runs his senior year and led the team in hitting his sophmore year. He then went on to play at University of Mobile (Alabama) where he also earned All Conference honors in the Gulf Coast Conference. After finishing his eligibility two summers ago, he got hit in the face by a pitch and that could have ended his career, but he was determined to play again. He became the graduate assistant at University of Mobile and 2 summers ago played in the Metro League again. Justin is also a Coach of the St. Louis Gamers 15U Gray Team. He enjoys playing golf and being a baseball hitting instructor.


Kevin Wheeler

Hitting/Throwing Mechanics/Catching Instructor


Kevin has been playing and or coaching baseball for the past 28 years. Prior to coming to St. Louis he taught private hitting, pitching, and catching lessons with Professional Baseball Instruction of Illinois where he also was active in the schools camps and in their team instruction program. Prior to working with PBI of Illinois, Kevin worked as a “roving instructor” for all three teams (freshman, junior varsity, and varsity) at Grayslake H.S. in Grayslake, IL and spent time before that coaching both high school and collegiate Summer League teams in Michigan.

Before he got into coaching Kevin played for the Miami Hurricanes in the early 90’s where he played for the “Wizard of College Baseball” Ron Fraser and learned catching skills playing behind 4 time National League Gold Glove winner and 2 time National League All-Star Charles Johnson. Though primarily a catcher in his playing days, Kevin has significant experiance at every position on the field.

Off the field, Kevin is a talk show host and sports reporter for KMOX 1120-AM. He is also an established baseball writer who was the “Minor League Baseball Expert” for the Sporting News from 2001-2005 and wrote scouting reports on both Major League and Minor League players for Diamond Library publications from 1998-2007.


Rachel Gill

Hitting Instructor


  • Head Varsity Coach, Incarnate Word Academy
  • Catcher for St. Louis Saints
  • Chosen to play for STL All-Star Team in 2008 to play against Team USA on their Bejing Tour
  • 2nd Place Finish in 2012 Women’s Fastpitch Nationals
  • All American catcher at DePauw University
  • SCAC Conference Offensive Player of the Year for 2007 & 2009
  • SCAC All Conference Honors & NFCA All-Region Honors
  • Incarnate Word Academy Softball – All Conference Honors and Metro Honors


Matt Hummert

Hitting Instructor


Matt has been involved in the St. Louis Baseball Community for more than fifteen years. In 2005 he served as the Coach of the 15U United States National Team in Japan. As a catcher and infielder, Matt played three years at the University of Missouri, Columbia and one year at Harris Stowe State College. For the previous eight years, Matt has served as a baseball instructor at various area facilities before joining the All-Star Performance team.


Mindy Danielson

Softball Hitting Instructor


Mindy is the highest ranked softball player that the Mid-West region has seen in the past decade. Mindy was the Lead Softball Coach at A Game Sports/Play Ball USA Clinic where she instructed general game techniques to all ages of girls & equipped set up and designed drills for girls to work on techniques of the game. Mindy was the Head Coach for 14U Missouri Warcats in 2001, Top Ranked AAA Outfielder for Womens California Jazz Softball Team (only player from Mid West recruited for Southern California Team) & made 3rd Team All American. Mindy was the Head Coach at St. Charles Community College from 1997-1999 & placed 2nd in Region. Mindy was an outfielder for Decator Pride & invited to the Canada Cup. She was voted most valuable player for mulitple games. In 1994 she was the assistant coach for Florissant Valley Jr. College.


Russell Cooper

Softball Pitching Instructor


Russell is the current Assistant Coach on the Washington University Softball Staff. Russell has been involved in competitive softball for over 30 years. He was an ASA All-American Pitcher in New Zealand. He was a former advisor to the Canadian Nation CANpitch program. Russell was a pitching coach to the New Zealand Junior National team during the 2013 World Championship gamers. He currently provides small group pitching instruction.


Barb Porter

Softball Catching, Hitting and Fielding


Barb was the First Missouri State softball All-American pick as a senior in 1993. She was named to the National Fastpitch Coaches Association All-America Third Team after one of the most outstanding careers in the program’s history. Barb ranked among the national top-10 in batting average for her senior year-finishing with a record .442 mark and also ranked 1st in the MO Valley Conference in hits (68) and stolen bases (22). She holds records for hits (252), total chances (1287), batting average (.403); is 2nd in stolen bases (58) and at bats (626); is 3rd in putouts (1013); and 4th in runs (113) and was the 1st player in Gateway/MVC history to win all-league honors 4 straight years. Barb received Missouri State Outstanding Female Athlete award in 1992 & 1993 and was inducted into Missouri State Athletics Hall of Fame in 2000. In 2013, she became the only player to have her jersey retired by the Missouri State Softball Program. In recent years, Barb was the Co-Director of Gamers Fastpitch Program.


Andy Marks



Andy was a freshman at the University of Kansas in 2006 when the Jayhawks won their first Big II Tournament Championship in school history. It was one of two NCAA Tournament appearances he made as a Kansas pitcher. In his first two seasons in Lawrence, Andy had an impressive 122 strike outs in 124 innings of work. He spent his summers in the esteemed Northwoods League, pitching for the Duluth Huskies. He compiled a 16-6 record, was named an All-Star in 2007, threw the first no-hitter in franchise history and had a sub-2.00 ERA in two NWL campaigns. Andy has taken is experiences to coaching and has become a Pitching Instructor for All-Star Performance and a St. Louis Gamers Coach.


Brett Freund

Hitting and Catching


Brett currently coaches for the St. Louis Gamers at the high school level. He graduated and played two years at Lincoln College. Brett continued playing for two years at Fontbonne University. He was a starting catcher all four years in college and led the teams Batting Average in 2013. That same year, Brett was elected to SLIAC 2nd team All Conference. In 2014, he was elected to SLIAC All Tournament team. Brett joined the All-Star Instruction staff in 2014.


Bryan Niedbalski

Hitting and Fielding


Bryan was a 4 year starter at DeSmet Jesuit High school under coach Greg Vitello. He led the team to district championship his Jr. year. He received an athletic scholarship and played four seasons at first base for the University of Iowa. Bryan finished in the top ten percent for on base percentage for the Big Ten as a freshman. Bryan is currently the hitting coach at Maryville. In addition, Bryan is a St. Louis Gamers coach. Bryan joined the All-Star Instructional Staff in 2014.