Adam Jahnsen pitched collegiately at Lindenwood University, St. Louis Community College at Forest Park and Xavier University. After college, he signed professionally with the Gateway Grizzlies of the Frontier League and moved on to the St. Louis Cardinals Organization.
After his playing career was over, Adam began providing pitching instruction for Balls n Strikes from 2004-2016. In 2016, he started A.C.E. Pitching Academy where he trains youth, high school, collegiate and professional pitchers. Adam has extensive knowledge and is a great communicator to students with all different ability levels. He is regarded as one of the top pitching instructors in the St. Louis area.