(written from a Production point of view)
Lloyd Andrew Weaver (born 27 January 1964; age 56) from Diamond Bar, California is a former boxer and actor who portrayed together with his triplet brothers Floyd and Troy the Mariposan triplet clones in the Star Trek: The Next Generation second season episode "Up The Long Ladder". He received no credit for this appearance.
Juanita Weaver, mother of eleven, is also the mother of former WBA heavyweight champ Mike Weaver. All three triplet brothers attended the Edgewood High in West Covina, California.  In 1989 Lloyd Weaver was boxing in middleweight and known as "Lightning Lloyd" while all three together were known as "Weaver Triplets". Lloyd Weaver ended his boxing career in 2001. 
Together with his brothers he appeared in Gap ads and portrayed one of the triplets in the 2005 boxing comedy One More Round which also featured Tony Amendola, James Black, Juliana Donald, and George Murdock. Without his brothers, Lloyd Weaver also appeared as a Boxing instructor in the 2006 Nip/Tuck episode "Blu Mondae".