After graduating Manchester High School in Manchester, CT as a three sport captain, Petersen attended the University of Hartford on a baseball scholarship. At Hartford, Petersen had a successful career, leading the team as a two year captain culminating in a 29-12 record his senior year where they were named New England Division 1 Team of the Year. Petersen was named Hartford Courant Rookie of the Year for the State of Connecticut in his first year at Hartford and was named to the First Team All-New England Division 1 Team his senior year batting .390. He graduated from University of Hartford with a degree in Organizational Communication in 1989.
Following college, Petersen had stints as the hitting coach at University of Hartford, Sacred Heart University, and the Danbury Westerners in the NECBL collegiate league. He also was the Head Coach at Manchester Community College. Petersen was inducted to the Manchester Sports Hall of Fame in 1993.
Petersen has also coached baseball at the High School level (Danbury High School), and youth level (Newtown) where his Cal Ripken and Babe Ruth teams won eight District Championships, four State Championships, participated in three Regional Championship Final games, and won a Regional Championship and a trip to the Babe Ruth World Series in 2016.
Petersen has two master’s degrees in education and administration from Sacred Heart University and a master’s degree in history from Western Connecticut State University.
He currently teaches history at Scotts Ridge Middle School in Ridgefield, Connecticut and is married to his wife Deborah. They live in Newtown, Connecticut and have five children, Ryan, Todd, Jake, Jack and Kate.