Baltimore Orioles Combined No-Hitter, 1991

Bob Milacki, Mike Flanagan, Mark Williamson and Gregg Olson threw a combined no-hitter for the Baltimore Orioles against the Oakland Athletics on July 13, 1991. The final score was 2–0.

The game was played at Oakland-Alameda County Coliseum in Oakland. Bob Milacki, Mike Flanagan, Mark Williamson and Gregg Olson struck out 5. The announced attendance was 40,047. The game took 2h 38m. It was a day game under cloudy skies, at 62 degrees.

It was one of seven no-hitters thrown across the major leagues in 1991. Eric Show took the loss for the Oakland Athletics. The Oakland Athletics used four pitchers of their own. Chuck Meriwether umpired behind the plate.