John Peter Petrucci (born July 12, 1967) is an American guitarist best known as a founding member of the progressive metal band Dream Theater. He has produced (along with his bandmate Mike Portnoy) all Dream Theater albums since their 1999 release, Metropolis Pt. 2: Scenes from a Memory. Petrucci was named as the third player on the G3 tour six times, more than any other invited guitarist. GuitarOne ranked him as the 9th Greatest Shredder of All Time.