Thomas Michael Victor is an American guitarist, singer, songwriter, and producer. He is best known as the lead singer and guitarist for heavy metal band Prong, which he founded in New York City in 1986, as well as the guitarist for heavy metal band Danzig intermittently since 1996 and full-time since 2008.

Groove metal, sometimes also called neo-thrash or post-thrash, is a subgenre of heavy metal music that began in the early 1990s. Heavily influenced by thrash metal, groove metal features raspy singing and screaming, down-tuned guitars, heavy guitar riffs, and syncopated rhythms. Groove metal is usually slower than thrash. Pantera are often considered the pioneers of groove metal, and the genre expanded in the 1990s with bands including White Zombie, Machine Head, and Sepultura. Successful groove metal acts of the 2000s include Lamb of God, DevilDriver, and Five Finger Death Punch.