The Arizona Diamondbacks are playing as well as they have all season. Because of that, the best team in baseball is in its first lull, if you can call a four-game losing streak a lull. Arizona took the first two games of a three-game series against the Los Angeles Dodgers (91-40) with a 6-4 victory Wednesday, extending the Dodgers' losing streak to a season-worst four games and handing them their second consecutive series loss, another season first.