Lefty Tom Drees, 26, pitches his third no-hitter of the season for AAA Vancouver, beating Las Vegas, 5 – 0, in the 7-inning opener of a doubleheader. He fired consecutive 1 – 0 no-hitters, beating Calgary in nine innings (May 23rd) and Edmonton in seven (May 28th). Drees, now 12-11, will pitch 7+ innings for the White Sox in 1991 for his only major league action.

On August 16, 1989 — Lefty Tom Drees, 26, pitches his third no-hitter of the season for AAA Vancouver, beating Las Vegas, 5 – 0, in the 7-inning opener of a doubleheader. He fired consecutive 1 – 0 no-hitters, beating Calgary in nine innings (May 23rd) and Edmonton in seven (May 28th). Drees, now 12-11, will pitch 7+ innings for the White Sox in 1991 for his only major league action.

Source:
Baseball Reference August 16
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game