The Rockies rebuilt their pitching staff this winter in part by trading for two inexperienced starters who don't strike out many men and take divergent approaches to getting hitters out. Righthander Tyler Chatwood, 22, acquired from the Angels, got 1.5 ground balls for every fly ball he allowed, as a rookie last year. Righty Guillermo Moscoso, 28, picked up from the A's, had the highest fly ball rate (55.5%) of any pitcher with at least 100 innings pitched—in fact, he was the only one above 50%. Now, even humidor-era Coors Field is a tough place for fly ball pitchers, so manager Jim Tracy can squeeze out the most from his two hurlers by platooning them by location. Chatwood and his emphasis on 93-mph fastballs down in the zone should get the call most often at home, while Moscoso and his lesser stuff (he averages 91 on his heater) can get the bulk of his starts in friendlier confines, especially in a division with three pitchers' parks, in Dodger Stadium, AT&T Park and Petco Park. It's a more complicated way of running the rotation, but it has been done; until the 1960s, many managers used much more flexible approaches in handing out starting assignments.