DENVER — Coors Field is supposed to be an extreme hitter’s park, but the New York Mets aren’t exactly the most extreme hitters in baseball at the moment. On a chilly Monday afternoon ahead of a spring snowstorm, both the Mets and the Colorado Rockies had some cool bats for the first five innings of play. Just ask Mark Vientos, who nearly had two home runs, but both fell just short of crossing ...