Of all the early-season surprises perhaps the most pleasant is blooming in the desert. That's where the National League leader in batting average, slugging percentage and OPS resides. Ildemaro Vargas, a 34-year-old utility infielder whose previous nine Major League Baseball seasons have been quite nondescript, has not simply taken up position atop the leaderboards to look down on much more well-known hitters . Vargas, who has only reached the minimum number of plate appearances to be eligible for such honors this week, is riding a 22-game hitting streak. He's collected a knock in every single game he's played this year for the Diamondbacks to help them keep pace in an extremely tough National League West populated by the Dodgers and Padres. This is a development no one could have seen coming. Even the most rose-colored glasses in the Phoenix front office are being cleaned for another look at the game logs and eye-popping statistics.…