The hottest team in baseball isn’t the New York Yankees, the Tampa Bay Rays, the Minnesota Twins, Philadelphia Phillies, or San Francisco Giants. It’s the Colorado Rockies, who won their 10th straight game on Sunday with a pinch-hit walk-off two-run homer from Jason Giambi with two outs in the bottom of the ninth inning. The Rockies’ 4-2 win over Arizona at Coors Field completed a sweep of the series and pulled Colorado to within 1 1/2 games of first place San Diego and San Francisco in the National League West. The Rockies will have a chance to cut further into that deficit as they begin a series tonight with San Diego. Colorado’s late-season run is reminiscent of 2007, when the Rockies made a furious late-season run to make the playoffs and take the NL pennant, winning 20 out of 21 games before getting swept by the Red Sox in the World Series. But many of the faces have changed. That Rockies team was managed by Clint Hurdle and featured stars like Matt Holliday and Brad Hawpe. This year’s team is led by young star outfielder Carlos Gonzalez and shortstop Troy Tulowitzki, along with NL Cy Young candidate Ubaldo Jimenez and manager Jim Tracy.