As a closer for the Giants, he recorded three saves during the 2012 World Series, helping the Giants win the title. During the playoffs, he had saves in the clinching games of the NL Division Series and the World Series.

Romo was born in Brawley, California to Mexican parents. His grandfather and father both played baseball; his grandfather was a member of the Mexico City Diablos Rojos. Frank, Sergio's father, built a pitching mound in the backyard and taught Romo how to throw. He graduated from Brawley Union High School in 2001, having played shortstop and third base on the baseball team. With no scholarship offers from four-year colleges, Romo nearly signed enlistment papers to follow his father in the U.S. Navy, but opted to play baseball at junior college instead.

Romo first went to Orange Coast College before transferring to Arizona Western College. Romo was named to the All-Region I second team of the Arizona Community College Athletic Conference in 2002 and 2003. In 159 innings, Romo earned a 16-4 overall record with a 2.79 earned run average (ERA).

For his junior and senior years, Romo played NCAA Division II baseball at two colleges: the University of North Alabama (2004) and Mesa State College (2005). He was named First-Team All-Gulf South Conference in 2004 while playing for North Alabama and was 10-3 with a 3.69 ERA in 97.1 innings. In his senior year with Mesa State, he was the Rocky Mountain Athletic Conference Pitcher of the Year. In 2009, the RMAC named Romo "All-Time Top Pitcher."

...
Wikipedia