John Andrew Mader (born October 22, 1963) is an American drummer who has performed and recorded with such successful acts as Pat Benatar, Steve Miller, Josh Groban, Bonnie Raitt, Booker T. Jones, the Family Stone, Gregg Allman, Joe Satriani, Patti Austin, and Billy Sheehan amongst others. He has also played drums on such hit musicals as Rent, Wicked, Mamma Mia!, The Lion King, and Hamilton.