Acting

Horvitz first appeared in a 1976 Freshen Up gum commercial, which led to other commercial appearances and several hand modeling jobs. After a brief stint in an off-Broadway production of Oliver! he went on to make appearances on television series such as Kids Incorporated and Safe at Home, and films such as Summer School, How I Got into College, and Deadly Weapon.^[5] From 1988 to 1991, he starred as Howie for two seasons in the syndicated television sitcom The Munsters Today.

Voice acting

Starting in 1993, Horvitz changed the focus of his career to voice acting, starting with the voices of Alpha 5 and Alpha 4 in the live-action series Mighty Morphin Power Rangers. From there, he had several other voice roles in such animated series as The Angry Beavers (as Daggett), Invader Zim (as Zim),^[6] Kim Possible, Dave the Barbarian (as Ned Frischman), Zatch Bell! (as Kanchomé), The Grim Adventures of Billy & Mandy (as Billy and his father Harold),^[7] Ben 10 (as Grey Matter), Squirrel Boy (as Rodney), and Shorty McShorts' Shorts (as Dudley). He also co-wrote the Grim Adventures of Billy and Mandy episode "Keeper of the Reaper" alongside his wife Kristen Lazarian.

After his stint as Alpha 5 ended, Horvitz went on to voice a few monsters in other Power Rangers series and was also the voice of Alpha 7 in the Power Rangers Wild Force episode "Forever Red". He voiced the main characters of Raz in the Psychonauts series and Orthopox in the Destroy All Humans! series. He has also voiced various NPCs in EverQuest II, the Berserker Darklings in The Darkness, Bumble in Kinectimals, and Kaos in Skylanders: Spyro's Adventure.^[8]

Horvitz voiced "Green Grapes" in the Fruit of the Loom commercials and has acted on stage, including in Jeffrey Hatcher's Mrs. Mannerly.^[9]

Horvitz also voices Moxxie and serves as a voice director in the adult animated web series Helluva Boss. He also played the roles of Alpha 8 and Alpha 9^[10] in the Netflix special Mighty Morphin Power Rangers: Once & Always, which celebrated the 30th anniversary of the Power Rangers franchise.^[11]

Comedy

In 2001, Horvitz was in the sketch comedy group The MoHos with Fred Willard, created by Fred's wife Mary Lovell.^[12] He and Fred would sometimes perform on various talk shows including Jimmy Kimmel Live! and The Tonight Show with Jay Leno. Horvitz also appeared in an episode of Saturday Night Live in the short segment "Bear City" and briefly appeared on Tosh.0.^[12]

Film

Television

Web series

Video games

Audiobooks

• Goosebumps: Attack of the Mutant – Skipper Matthews

Theme park attractions

• Tower of Terror (Tokyo DisneySea) – Shiriki Utundu^[22]
• The Twilight Zone Tower Of Terror (Walt Disney Studios) – Shaft Creatures