He was born in Des Moines, Iowa, but soon moved to Sioux Falls, South Dakota. In the early 1980s, he appeared as disc jockey "Dennis Jimenez" (Dennis the Menace) on KELO AM1320 in Sioux Falls.
He was the announcer for the second incarnation of The Tonight Show with Jay Leno, and the current voice of Jon Arbuckle in The Garfield Show. He is also known for his role as one of the The Almighty Tallest in Invader Zim (along with Kevin McDonald), Ant-Man/Giant-Man from The Avengers: Earth's Mightiest Heroes, the Riddler from the Batman: Arkham video game series, and Renji Abarai from the U.S. dub of Bleach.
He currently works and lives in Los Angeles, California.
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