1. Must capitalize: The Orioles complete their home schedule with a timely series against one of the worst teams in baseball, the Arizona Diamondbacks. This weekend has gained in importance because of the Orioles' four-game sweep at the hands of the division-leading Boston Red Sox. Trailing by seven games in the division race with nine games to go, the Birds can just about close the book on winning the American League East. But they find themselves on the outside of the wild-card race as the weekend begins, in a fight to get back in position to participate in the one-game playoff. The Orioles trail the Toronto Blue Jays by 1 1/2 games and the Detroit Tigers by a half-game. They sit one game ahead of the Houston Astros, 1 1/2 ahead of the Seattle Mariners and 2 1/2 ahead of the New York Yankees.