Born in Guayubín, he threw and batted right-handed, and was listed as 6 feet 2 inches (1.88 m) tall and 215 pounds (98 kg).

"Chi-Chi" Olivo was 27 years old when he signed with the Milwaukee Braves prior to the 1955 season, and was 33 when he made his major league debut on June 5, 1961.

That one run came against the Los Angeles Dodgers courtesy of a Maury Wills infield bunt single in extra innings.

After reaching first, Wills stole second, and came around to score on a two out single by Lou Johnson off Dick Kelley to give Olivo his only loss on the season.

In his 96 MLB games, all in relief, Olivo compiled a 7–6 record with 12 saves and a 3.96 career earned run average.