During his career as an athlete, Librán distinguished himself for practicing several sports. He played for the Vaqueros de Bayamón of the
Puerto Rico volleyball league, and in 1965 played for the
Atléticos de San Germán of the
Baloncesto Superior Nacional. He also practiced
track and field and
high jump. However, Librán became more known for his career as a baseball player. Although he played mostly as a
shortstop, he could also play
second and
third base. In 1965, while also playing basketball, Librán helped the Patrulleros de San Sebastián of the
Doble A Baseball League in Puerto Rico to win the championship. He also played with San Juan, Arecibo, and Caguas in the
Puerto Rico Professional Baseball League. In 1968, Librán was signed by the
Chicago Cubs of the
Major League Baseball, and spent that season split between two Class A Cub affiliates. While a member of the Cubs' Double-A
San Antonio Missions team, he was traded along with
Joe Niekro and
Gary Ross to the
expansion San Diego Padres for
Dick Selma on April 24, 1969. He remained with the Missions all season and was added to the San Diego roster after September 1. Librán made his Major League debut as a
shortstop in the season. In his debut game, Librán went
hitless in two
at bats against
Woodie Fryman of the
Philadelphia Phillies. Thirteen days later, he collected his only major league hit, an
RBI-
double off
Tom Griffin of the
Houston Astros. Librán played in ten games as a Major Leaguer. After suffering a knee injury, Librán was sent to the
minor leagues, where he played for two more years. He left the game after the 1971 campaign. Despite this injury, Librán continued to play in Puerto Rico for teams like
Senadores de San Juan,
Lobos de Arecibo,
Criollos de Caguas, and
Indios de Mayagüez. After retiring from baseball, Librán played
softball for Mayagüez from 1977 to 1987. ==Later years and death==