Sergio Valdez debuted on September 10, 1986, playing for the Montreal Expos at Stade Olympique; he played his final game on September 26, 1995, playing for the San Francisco Giants at Candlestick Park.
Sergio Escalona debuted on May 17, 2009 and played his final game on September 7, 2011.
Sergio Ferrer debuted on April 5, 1974 and played his final game on September 28, 1979.
Sergio Valdez played in 24 games at pitcher for the Cleveland Indians in 1990, starting in 13 of them. He played for a total of 307 outs, equivalent to 11.37 9-inning games. He made 8 putouts, had 11 assists, and committed 2 errors, equivalent to .176 errors per 9-inning game. He had one double play.
Sergio Valdez played in 5 games at pitcher for the Montreal Expos in 1986, starting in all of them. He played for a total of 75 outs, equivalent to 2.78 9-inning games. He made 3 putouts, had one assist, and committed one error, equivalent to .36 errors per 9-inning game. He had one double play.
NFL player Sergio Brown played for Notre Dame.
NFL player Sergio Castillo played for West Texas A&M.
Cesar Valdez debuted on May 3, 2010, playing for the Arizona Diamondbacks at Chase Field; he played his final game on June 10, 2010, playing for the Arizona Diamondbacks at Chase Field.
Efrain Valdez debuted on August 13, 1990, playing for the Cleveland Indians at Cleveland Stadium; he played his final game on July 10, 1998, playing for the Arizona Diamondbacks at Bank One Ballpark.
Ismael Valdez debuted on June 15, 1994, playing for the Los Angeles Dodgers at Dodger Stadium; he played his final game on October 1, 2005, playing for the Florida Marlins at Dolphin Stadium.
Jose Valdez debuted on April 17, 2011, playing for the Houston Astros at Minute Maid Park; he played his final game on October 3, 2012, playing for the Houston Astros at Minute Maid Park.
Mario Valdez debuted on June 15, 1997, playing for the Chicago White Sox at Comiskey Park II; he played his final game on June 22, 2001, playing for the Oakland Athletics at Oakland Coliseum.
Merkin Valdez debuted on August 1, 2004, playing for the San Francisco Giants at SBC Park; he played his final game on September 25, 2011, playing for the Texas Rangers at Rangers Ballpark in Arlington.