Luis Exposito debuted on May 4, 2012, playing for the Baltimore Orioles at Oriole Park at Camden Yards; he played his final game on September 9, 2012, playing for the Baltimore Orioles at Oriole Park at Camden Yards.
Luis Aponte debuted on September 4, 1980 and played his final game on July 6, 1984.
Luis Aguayo debuted on April 19, 1980 and played his final game on September 30, 1989.
Luis Alcaraz debuted on September 13, 1967 and played his final game on June 7, 1970.
Luis Alicea debuted on April 23, 1988 and played his final game on September 25, 2002.
Luis Aloma debuted on April 19, 1950 and played his final game on August 30, 1953.
Luis Alvarado debuted on September 13, 1968 and played his final game on April 30, 1977.
Luis Andujar debuted on September 8, 1995 and played his final game on June 28, 1998.
Luis Aparicio debuted on April 17, 1956 and played his final game on September 28, 1973.
Luis Arroyo debuted on April 20, 1955 and played his final game on May 28, 1963.
Luis Atilano debuted on April 23, 2010 and played his final game on July 20, 2010.
Luis Ayala debuted on March 31, 2003 and played his final game on September 29, 2013.