Earl Hamilton threw the first no - hitter in Orioles history on August 30, 1912; the most recent no - hitter was a combined effort by Bob Milacki, Mike Flanagan, Mark Williamson and Gregg Olson on July 13, 1991. No - hitters have been thrown by four left - handed starting pitchers and five right - handers. Seven no - hitters were thrown at home and two on the road. There have been two no - hitters in April, three in May, one in July, two in August, and one in September. The longest interval between no - hitters was 36 years from May 6, 1917 (Bob Groom) to May 6, 1953 (Bobo Holloman). The shortest interval was one day, May 5, 1917 (Ernie Koob) to May 6, 1917 (Groom). The franchise no - hit the Oakland Athletics (formerly "Philadelphia Athletics '') the most, three times, by Holloman in 1953, Jim Palmer in 1969, and a combined no - hitter by Milacki, Flanagan, Williamson, and Olson in 1991. In two no - hitters, the team allowed at least one run: by Hamilton in 1912 (which was a loss) and a combined no - hitter by Steve Barber and Stu Miller in 1967. The most baserunners allowed in a no - hitter was a combined no - no by Barber and Miller, who allowed 14 in a 2 -- 1 loss to the Detroit Tigers in 1967. Of the nine no - hitters, two have been won by a score of 1 -- 0 and two by a score of 6 -- 0, more common than any other result. The largest margin of victory was an 8 -- 0 win by Palmer in 1969. The smallest margin of victory was a 1 -- 0 wins by Koob in 1917 and Hoyt Wilhelm in 1958.
who pitched the first no-hitter in orioles history
Earl Hamilton