Spencer Prokop was a writer and voice actor for FUNimation Entertainment. As a writer, he wrote the scripts for the English adaptations of BECK: Mongolian Chop Squad, Kodocha, Mushi-Shi, One Piece, School Rumble, Solty Rei, Trinity Blood, Tsubasa: Reservoir Chronicle, and XXXHolic. As a voice actor, Prokop provided his talents to Baccano!, Darker Than Black, and Kenichi the Mightiest Disciple.

Prokop was born in Milwaukee, Wisconsin on August 1, 1957. He graduated from the University of Wisconsin at Stevens Point in 1978. Right out of college, Prokop became a professional actor; he performed at the Fireside Theatre in Fort Atkinson, Wisconsin. In 1980, Prokop moved to Dallas to attend the graduate study program at Trinity University. Prokop had roles in several theater productions, which included: Henry Higgins in My Fair Lady at the Granbury Opera House, Robert Law in Boy Meets Girl at the Addison Centre Theater, and Orgon in Tartuffe at the Pegasus Theatre. In 1990, he was selected to study at the Royal National Theater in London. In 1997, Prokop received a Dallas Theater Critics' Forum award for his role as Bernard Nightingale in Arcadia at the Theatre Three. Prokop was also a founding member of Lone Star Comedy. He also played Lt. Foster in the Black and White productions at the Pegasus Theater. Prokop also had a role in Man from Nebraska.

Outside of anime and theater, Prokop also had roles in Challenger, Dangerous Curves, Final Verdict, Jailbirds, A Killing in a Small Town, Necessary Roughness, The Operator, RoboCop (as a nervous gas station attendant, in a scene that has become a minor classic of terrified silent comedy), To Serve and Protect, Walker, Texas Ranger, and Without Warning: The James Brady Story. Prokop also lent his voice to several video games: Age of Empires II: The Age of Kings, Age of Empires II: The Conquerors, Age of Mythology, Blair Witch Volume 1: Rustin Parr, Crusader: No Regret, and Deus Ex.

In 2003, Spencer and his wife, Patty Lewis, were featured as part of a Newsweek cover story about mothers who work full time and fathers who don't. Prokop took time off from working for a short time after their son, Chase, was born.

Sadly, Spencer Prokop passed away from pancreatic cancer on June 7, 2009, at the age of 51. Spencer is survived by Patty and Chase, as well as by other members of his immediate family.