Bollo was signed by Chicago in 1964, and was a starting pitcher for 2 different class-A teams in the Sox' organization, before jumping all the way to the majors in 1965. He was with the White Sox for the entire '65 season, pitching 22 innings across 15 games, but finishing with a 0-0 record.
Greg was busted all the way back to class A in 1966, compiling an 11-11 record in 25 starts, before being recalled in September. His game action with Chicago consisted of 2 relief appearances in late September, as well as starting the last game of the season, a 2-0 loss to the Yankees where he lasted 4 innings. That was to be his last major-league appearance.
Bollo pitched the next 4 seasons for the White Sox' AAA and AA clubs, mostly as a starter, then hung up his spikes after the 1970 season.
We're getting near the end of the "Final Card" series. I don't have the (final) 1966 cards for Bob Purkey, Dick Bertell, Art Mahaffey, Choo Choo Coleman, Chi Chi Olivo, Bob Sadowski, Dave Roberts, or