While it is hard to argue with Nolan or Trevor, I would have to go with DJ on this one. I think that an argument could be made for multiple players, and all of them are definitely deserving.
Since 2011, LeMahieu has been trending upwards, getting a little better each year. This is hands down his best statistical year.
DJ has been a consistent hitter and solid on defense, including pulling in a Golden Glove. He continued he solid defense this year, and really exploded as a hitter. DJ has never been a power hitter, and probably never will be, but he gets the job done.
That is the real reason why I would put him up for this. He is not as flashy of a player as some others (which I personally love) but he does everything. If the Rockies need a deep fly ball to bring in the guy at third, DJ delivers. Need a double to the gap? DJ can get it done. He stepped up his power a little bit, going yard more than he has his entire career.
Not to mention he brought home the Rockies third batting title in four years.
He is definitely not a flashy player, but he is the one that the Rockies can rely on the most to get the job done.