Claim: Mike Portnoy was in a band.
Evidence: Michael Stephen `` Mike '' Portnoy -LRB- born April 20 , 1967 -RRB- is an American drummer primarily known as the former drummer , backing vocalist , and a co-founder of the progressive metal/rock band Dream Theater.
Dream Theater is an American progressive metal band formed in 1985 under the name Majesty by John Petrucci , John Myung , and Mike Portnoy while they attended Berklee College of Music in Boston , Massachusetts.