[2] In July 2008, Coffin began touring with Dave Matthews Band and joined the group in 2009 following the death of founding member LeRoi Moore.

Born in Massachusetts and raised in Dexter, Maine, Coffin began playing alto sax in fifth grade under the tutelage of Arthur Lagassee, the band director for the district.

During the same year, he joined the Dave Matthews Band for their summer tour after saxophonist LeRoi Moore was injured in an all-terrain vehicle accident.

Coffin has also worked with Jeff Babko, Will Lee, Keith Carlock, Nir Felder, Dave Liebman, Randy Brecker, Grace Kelly, Nate Smith, Cory Wong, Roy "Futureman" Wooten, Victor Wooten, Chester Thompson, Keb' Mo', R.A.P Ferreira, Tony Hall, MonoNeon, Michael League, Robben Ford, Bill Evans, Daru Jones, Kris Myers, Marcus King, Derek Brown, Jeff Sipe, Charlie Peacock, Vinnie Colaiuta, Everyone Orchestra, R. Prasanna, Jonathan Scales, and JD Souther.

[2] With Béla Fleck and the Flecktones With Dave Matthews Band With Band Of Other Brothers With Portara Ensemble & Ciona Rouse With Dream Shanti With In Orbit With Jordan Perlson & Matt Wigton With Jeff Babko & Vinnie Colaiuta With Jon Foreman With Umphrey's McGee With Jonathan Scales With others