J Mascis

Joseph Donald Mascis Jr. (born December 10, 1965), better known as J Mascis, is an American musician who is the singer, guitarist and main songwriter for the alternative rock band Dinosaur Jr. 

He has also released several albums as a solo artist and played drums and guitar on other projects. 

He was ranked number 86 in a Rolling Stone list of the "100 Greatest Guitarists", and number 5 in a similar list for Spin magazine in 2012.