Major League Baseball is a game of windows. Unless you are the Los Angeles Dodgers, a storied franchise playing in a mega-market with an annual mega-payroll, the window to postseason success usually doesn’t remain open for long. The Kansas City Royals know all about that. They waited 29 years to qualify for the postseason before making the World Series in 2014. They won it all in 2015, beating the overmatched Mets in five games. But now the Royals are a .500 baseball team again. The Rockies’ window appears wide open, with general manager Jeff Bridich going so far as to say the 2018 squad is capable of winning a World Series. But is there enough homegrown talent in the Rockies’ farm system to give them a period of sustained success? Can the Rockies withstand the possible all-star departures of center fielder Charlie Blackmon and second baseman DJ LeMahieu, both of whom are scheduled to become free agents after this season? And what happens if third baseman Nolan Arenado, the five-time Gold Glover and RBI machine, departs after the 2019 season? Zach Wilson, director of player development, is not fretting. “I know we definitely have confidence in our young pitching depth, and it’s starting to coming to fruition at the major-league level,” Wilson said. “Regardless of what happens to the other guys (in the majors), we our building for future. “Our job is to not worry about Charlie, Nolan or DJ. Our goal is churning out impactful, major-league players from year to year. We think we have a chance to do that for a really long time.” It’s no secret that the Rockies, under Bridich, hold on to their prospects like precious gemstones, particularly their farm-raised pitchers. Wheeling and dealing is not the Rockies’ MO. Since the end of the 2015 season, Jerry DiPoto, Seattle’s GM, has made 62 trades. The Rockies, by contrast, have made only 12 trades during the same time period. Rivals ask about prime infielders Ryan McMahon and Brendan Rodgers, but the Rockies turned a cold shoulder to offers. Although the Rockies are bullish on their farm system, and therefor their future, outside reviews are mixed. Baseball America recently ranked all 30 farm systems, with the Rockies coming in at No. 20, down from their No. 10 ranking in 2017. However, (part of, ranked Colorado eighth. “The Rockies remain strong on the farm despite graduating David Dahl, Jon Gray, Trevor Story and several other rookies to the big leagues …,” said the MLBPipeline story. “They have one of the most balanced systems around, with depth in both position players and pitchers.”