Spadafina is in his first year as the assistant swimming coach at Central. He spent the last two years as the volunteer coach for CCSU where he worked with numerous Northeast Conference All-Conference team members, conference champions and school record holders. He has been coaching on the USA Swimming Club level since 2002. He was a coach for the Farmington Valley Swim team, Omni Swim Club, Cheshire Y/Sea Dog Swim Club and was the Assistant Competitive Swimming Director/Senior Coach for the New Canaan YMCA.

During his 10 years of coaching, he has worked with all levels of swimmers. He has coached numerous Connecticut age group and senior champions, Eastern Zone qualifiers, YMCA National All-Americans, national age group top-10 finishers, and junior and senior national qualifiers. He has also represented Connecticut Swimming as an Eastern Zone coach and as a member of the board of directors.

Spadafina graduated from CCSU in 2003 with a bachelor's degree in history. He was a member of the Central men's swimming and diving team and was named the team captain in 2001-02. A native of Staten Island, NY, John resides in Meriden, CT with his wife Amber and daughter Chloe.