John Dwyer is an American multi-instrumentalist, vocalist, songwriter, visual artist, and record label owner.

He is best known as the founding member and primary songwriter of the garage rock band Osees, with whom he has released 23 studio albums.

In addition to his work with Osees, Dwyer records solo material under the name "Damaged Bug".

From 2020-2021, Dwyer released several improvisation-based records with a rotating collective of different artists, including "Bent Arcana", "Witch Egg", "Endless Garbage", "Moon Drenched" and "Gong Splat".

In 2006, Dwyer met Matt Jones at a party, and together, with Brian Lee Hughes, they founded Castle Face Records.