Mike Mangini (born April 18, 1963) is an American drummer. Since 2010, he has been a member of progressive metal band Dream Theater, following the departure of founding drummer Mike Portnoy. He has also played for bands and artists such as Annihilator, Extreme, James LaBrie, and Steve Vai. Before joining Dream Theater, Mangini was a faculty member at Berklee College of Music. Between 2002 and 2005, he set five World's Fastest Drummer records. Mangini appeared on the Discovery Channel show Time Warp, displaying his drum skills for high speed cameras.