Donnie Hamzik (born October 18, 1956) is an American musician and a former drummer for heavy metal band Manowar.
In 2009, Hamzik reunited with Manowar, due to personal differences between Columbus and the rest of the band.
He took part in Magic Circle Festival 2009 and also recorded the EP Thunder in the Sky.
On October 15, 2010, DeMaio announced on Facebook that Hamzik was officially a member of Manowar again after a 26-year absence.
For 2017's The Final Battle tour, Manowar replaced Hamzik with Brazilian drummer Marcus Castellani.