John Spencer

Career overview

Role: Meticulous television and film archivist.
Task: Write a 180-260 word career overview of John Spencer (Acting).
Constraints:
Use ONLY verifiable facts from provided sources.
No invented titles, names, dates, awards, etc.
Original, neutral, encyclopedic prose.
Plain text only (no markdown, no asterisks, no headings, no bullet points).
Word count: 180-260 words.
Structure: 2-3 short paragraphs.
No preamble or JSON.
Name: John Spencer (born John Speshock Jr. [2] or John Speshock III [3]).
Birth: December 20, 1946 [2, 4, 5, 6].
Birthplace: Paterson, New Jersey, USA [3, 6].
Death: December 16, 2005 [2, 4, 5, 6].
Deathplace: Los Angeles, California, USA [6].
Career/Roles:
Broadway: The Great White Hope (1969) [5].
Film: The Rock (1996) [5].
TV: L.A. Law (1990–1994) as attorney Tommy Mullaney [2].
TV: The West Wing (1999–2006) as Leo McGarry, White House Chief of Staff [2, 4].
Other: Left Paterson at age 16 for Professional Children's School [3]. Active years: 1983-2005 [6].
Paragraph 1: Early life and stage beginnings.
John Spencer, born John Speshock (identified as John Speshock Jr. or John Speshock III) in Paterson, New Jersey, was an American actor. He grew up near Paterson and left at age 16 to attend the Professional Children's School. He first gained recognition for his performances on Broadway, specifically in the 1969 production of The Great White Hope.
Paragraph 2: Television and Film career.
Spencer's career included work in film and television. He appeared in the movie The Rock in 1996. In television, he was known for his role as attorney Tommy Mullaney in the NBC legal drama series L.A. Law from 1990 to 1994. He is also best known for his role as White House Chief of Staff Leo McGarry on the NBC political drama series The West Wing, which aired from 1999 to 2006.
Paragraph 3: Death/Summary.
Spencer was born on December 20, 1946, and died on December 16, 2005, in Los Angeles, California.
Drafting for word count and flow:
John Spencer, born John Speshock (also identified as John Speshock Jr. or John Speshock III) in Paterson, New Jersey, was an American actor. He grew up near Paterson and left at age 16 to attend the Professional Children's School. Spencer first gained recognition for his performances on Broadway, most notably in the 1969 production of The Great White Hope.

His career transitioned into film and television, with his active years noted between 1983 and 2005. In film, he appeared in the 1996 movie The Rock. On television, he was recognized for his role as attorney Tommy Mullaney in the NBC legal drama L.A. Law from 1990 to 1994. He is best known for his portrayal of White House Chief of Staff Leo McGarry on the NBC political drama series The West Wing, which ran from 1999