Michael attended Central Bucks High School West, where he earned all-state honors as a quarterback and defensive back. His father, Mike Pettine Sr. was a head coach of this school, who is popular for compiling a record of 326–42–4 in 33 seasons and winning four state championships. He has also played as a free safety at the University of Virginia and also graduated in 1988 with a bachelors degree in economics.
Michael also served as a coach of high school football in Pennsylvania at North Penn and William Tennent high schools after working as a graduate assistant at the University of Pittsburgh. He also worked as an assistant coach for about four years under his father at Central Bucks West High School.
Later a New York Times TV crew created a movie, The Season, in which they documented the North Penn football season for ESPN. The show also contained the two separate hours and followed the team behind the scenes during the 1999 season and highlighted the rivalry between North Penn and Central Bucks West.
Michael also served as a coach and defensive coordinator for numerous team including Baltimore Ravens, New York Jets, Buffalo Bills, Cleveland Browns, and Green Bay Packers. Some popular football players who have played for Buffalo Bills are Greg Little and Aaron Williams.
Michael is an American by nationality and belongs to white ethnicity. He is a married man. He married his girlfriend; however, has not revealed detail regarding him. Michael has got three children: Katie Pettine, Megan Pettine, Ryan Pettine. He lives a happy married life along with his wife and children and has no any rumor of divorce between the couple.
Michael is a very popular football coach as well as player, who earns a tremendous amount of money from his professional career. According to some source, his current net worth is $4 million.