Slammers Baseball is the Premier Baseball Program in the state and region with some of the finest indoor training facilities.

Slammers is dedicated to fulfilling the needs of players of all ages and abilities. Our staff and instructors have over 70 years of combined High School, College and professional playing and coaching experience. We offer a wide variety of instruction including private one-on-one lessons, group and team clinics as well as specialty camps offered throughout the year.

We also have youth leagues and competitive youth and High School travel teams. We have placed hundreds of players in every level of collegiate baseball and the Major Leagues. Regardless of your skill level, you will benefit from our staff’s vast knowledge of pitching and hitting and fielding. Our 22,000 square foot Englewood facility offers 11 indoor tunnels for personal or team rental and size fully automated pitching machines to refine your baseball and softball skills.

Slammers Management Team

Holzemer

Mark is a proud Littleton native and President of Slammers Baseball & Softball. Mark is former Major League left-handed pitcher who was drafted in the 4th round of the 1987 draft after graduating from J.K. Mullen High School. Mark played at Seminole Junior College in 1988 where he pitched in the Junior College World Series and earned 1st team All-American honors.

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Mark began his 15 year professional career with the California Angels in 1988 where he was both a starter and relief pitcher. In addition to the Angels he pitched in the major leagues for the Seattle Mariners, Oakland Athletics and Philadelphia Phillies as well as playing for the Yokahama Baystars in the Japanese Major Leagues in 2001. Mark played three seasons of winter ball in Venezuela and one season in Mexico. Upon retiring in 2002 Mark became co-owner of Slammers baseball & Softball.

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Mark’s passion is working with players of all ages to teach them the great game of baseball. Since joining the Slammers organization Mark has given more than 8000 private lessons. Mark has coached from the ages of 6 to High School. He has competed with the Slammers teams in National tournaments across the country. Mark is currently an associate Scout for the Kansas City Royals.

Mark Holzemer
Owner & President
Mark Holzemer
Owner & President
Mark Holzemer
Owner & President

Mark is a proud Littleton native and President of Slammers Baseball & Softball. Mark is former Major League left-handed pitcher who was drafted in the 4th round of the 1987 draft after graduating from J.K. Mullen High School. Mark played at Seminole Junior College in 1988 where he pitched in the Junior College World Series and earned 1st team All-American honors.
Mark began his 15 year professional career with the California Angels in 1988 where he was both a starter and relief pitcher. In addition to the Angels he pitched in the major leagues for the Seattle Mariners, Oakland Athletics and Philadelphia Phillies as well as playing for the Yokahama Baystars in the Japanese Major Leagues in 2001. Mark played three seasons of winter ball in Venezuela and one season in Mexico. Upon retiring in 2002 Mark became co-owner of Slammers baseball & Softball.
Mark’s passion is working with players of all ages to teach them the great game of baseball. Since joining the Slammers organization Mark has given more than 8000 private lessons. Mark has coached from the ages of 6 to High School. He has competed with the Slammers teams in National tournaments across the country. Mark is currently an associate Scout for the Kansas City Royals.

Mark is a proud Littleton native and President of Slammers Baseball & Softball. Mark is former Major League left-handed pitcher who was drafted in the 4th round of the 1987 draft after graduating from J.K. Mullen High School. Mark played at Seminole Junior College in 1988 where he pitched in the Junior College World Series and earned 1st team All-American honors.

.
Mark began his 15 year professional career with the California Angels in 1988 where he was both a starter and relief pitcher. In addition to the Angels he pitched in the major leagues for the Seattle Mariners, Oakland Athletics and Philadelphia Phillies as well as playing for the Yokahama Baystars in the Japanese Major Leagues in 2001. Mark played three seasons of winter ball in Venezuela and one season in Mexico. Upon retiring in 2002 Mark became co-owner of Slammers baseball & Softball.

.
Mark’s passion is working with players of all ages to teach them the great game of baseball. Since joining the Slammers organization Mark has given more than 8000 private lessons. Mark has coached from the ages of 6 to High School. He has competed with the Slammers teams in National tournaments across the country. Mark is currently an associate Scout for the Kansas City Royals.

Holzemer
Holzemer
Martin
Martin
Zavaras
Zavaras
Jenkins
Jenkins
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