Keith Silverstein is an American voice actor, working in animation and video games but particularly in dubbing Japanese anime and titles. He voiced Ziggy the Rapping Zebrasaurus in a Sesame Street season 42 segment, produced by Australian animation studio Liquid Animation. (First: Episode 4270) (YouTube)
Silverstein voiced Vector the Crocodile in the Sonic the Hedgehog franchise, Kirby O'Neil on the 2012 Teenage Mutant Ninja Turtles series, and Lex Luthor in the game Batman: Arkham Knight. He has been heard in multiple Godzilla anime, short Pokémon net series, Amphibia, Tron: Uprising, and the 2001 Chuck Jones web series Timber Wolf.