In time, we’ll know if the Colorado Rockies and the Arizona Diamondbacks have enough pitching to challenge the preeminence of the Los Angeles Dodgers and San Francisco Giants at the top of the NL West. Colorado probably has the best collection of young power arms it has ever put together, and Arizona's young arms are good enough to hold up the back end of the Diamondbacks’ rotation if Zack Greinke and Shelby Miller are capable enough of leading the way.
Regardless of whether they are contenders for the playoffs, however, the Rockies and Diamondbacks will make existence in the NL West difficult for the Dodgers and Giants, based on the strength of their offenses.