On September 27, , Beattie hurled the first one-hitter in Seattle Mariners history against the Kansas City Royals. Outside of a U.L. Washington single in the third inning, Beattie was perfect. Perhaps the second best pitching performance of his career came in a losing effort. On July 25, , he and the California Angels' Ron Romanick locked up in a pitchers' duel. Beattie pitched eight innings of one hit ball while striking out nine. With the game still scoreless heading into extra innings, Beattie took the mound again in the tenth inning. Gary Pettis ended it with a two out single in the tenth. After the game, Beattie smashed a water cooler and refused to talk to reporters.