It wasn't like losing the World Series, but the Baltimore Orioles did have a six-game unbeaten streak ended.

Steve Sax singled home Cecil Espy in the fifth inning yesterday to break a 2-2 tie and give the Los Angeles Dodgers a 3-2 victory in an exhibition game in Vero Beach, Fla. Mike Marshall's sixth homer of the spring, in the second inning, put the Dodgers ahead, but the Orioles took a 2-1 lead in the third on Eddie Murray's two-run single. The Dodgers tied in the fourth when Greg Brock singled, reached third on two wild pitches and scored on Steve Yeager's fielder's choice. Storm Davis was the loser . . .

Jerry Royster was called the Braves' most valuable player the second half of last season, but he won't be in the starting lineup when this season opens. Said Royster, 30, that's "the biggest injustice of my life. If I don't have any chance to start for the Atlanta Braves, I don't want to play for the Atlanta Braves." . . .

Henry Aaron now plans to write the club owners asking that he be considered a candidate to replace Commissioner Bowie Kuhn, but expects them to rehire Kuhn. Said Aaron, "We've had two black managers in two decades; you ain't going to be a black commissioner. But what the heck, we've made some progress in this country . . . All they can do is say 'no.'