(written from a Production point of view)
Sal Butera (born 9 November 1963; age 57) is a professional pool player and technical adviser who worked behind the scenes as pool technical adviser on several episodes of Star Trek: Voyager. He received no credit for his work but is listed on the call sheets of the episodes. In addition, Butera appeared as a Voyager officer in the first season episode "The Cloud" for which he filmed his scenes on Tuesday 6 December 1994 on Paramount Stage 16 and reprised this role for the episode "Jetrel" for which he filmed his scene on Wednesday 22 March 1995 on Paramount Stage 16.
Butera is the son of late world-class player "Machine Gun" Lou Butera who also worked as technical adviser and background actor on several feature films. Butera Sr. passed away in 2015.  Like his father, Butera has been owner of a billiard hall, Butera's Billiards, located in Moorpark, California.
Butera has worked as technical adviser, pool coach, and hand double on over 100 films, television series, and commercials. He was the pool trick shot artist on the video production Playboy: Erotic Fantasies (1992).
Star Trek episodes
For the following episodes Butera worked as Pool Technical Adviser
- ButerasBilliards.com – official site