Miguel Eduardo Olivo Peña (born July 15, 1978 in Villa Vasquez, Dominican Republic) is a Major League Baseball catcher for the Seattle Mariners. He bats and throws right-handed.
Olivo was originally signed as an undrafted free agent by the Oakland Athletics in 1996 and played in the A's minor-league system through 2000. In December 2000, he was traded to the Chicago White Sox for Chad Bradford, an episode recounted in a chapter of the popular baseball/business book Moneyball, although Olivo was mentioned only in passing. In July 2001, while playing for White Sox Class AA affiliate Birmingham, Olivo was suspended for six games and barred from that year's All-Star Futures Game for using a corked bat. Olivo maintained the bat, which had an A's logo on it, had been given to him by a former teammate while playing in the Athletics system.
He made his major league debut on September 15, 2002 with the Chicago White Sox and played 6 games that year. He was traded from the Sox to the Seattle Mariners in June 2004 along with Jeremy Reed in exchange for Freddy Garcia and Ben Davis. After struggling with the Seattle Mariners he was traded to the San Diego Padres in 2005 for minor leaguer Daniel Mateo. A year later he was traded to the Florida Marlins in 2006.