Greg Bollo (born November 16, 1943 in Detroit, MI) is a retired right-handed relief pitcher who played for the Chicago White Sox between 1965 and 1966. He was signed by the White Sox as a free agent in 1964.

Greg debuted for the White Sox on May 9, 1965, in a 6-1 loss to the Minnesota Twins and played for the team for the remainder of the season. He began the 1966 season in the minor leagues, playing for the Lynchburg White Sox. He was promoted to the majors again in September and played in three games for the White Sox in the 1966 season.

His final major league game was on October 2, 1966; the game, a 2-0 loss to the New York Yankees, was the only game Bollo started in his career as well as his only major-league decision, as he was credited with the loss. After 1966, Bollo played in the minor leagues for several seasons and made appearances for the Evansville White Sox, Hawaii Islanders, Columbus White Sox, and Tucson Toros.

Greg's overall MLB ERA was 3.34.

(excerpted from Baseball Almanac, BR Bullpen & Wikipedia)